diff --git a/squirrelbattle/display/display.py b/squirrelbattle/display/display.py
index 9cc1456..29295de 100644
--- a/squirrelbattle/display/display.py
+++ b/squirrelbattle/display/display.py
@@ -2,9 +2,10 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 import curses
-from typing import Any, Optional, Union
+from typing import Any, Optional, Tuple, Union
 
 from squirrelbattle.display.texturepack import TexturePack
+from squirrelbattle.game import Game
 from squirrelbattle.tests.screen import FakePad
 
 
@@ -15,6 +16,9 @@ class Display:
     height: int
     pad: Any
 
+    _color_pairs = {(curses.COLOR_WHITE, curses.COLOR_BLACK): 0}
+    _colors_rgb = {}
+
     def __init__(self, screen: Any, pack: Optional[TexturePack] = None):
         self.screen = screen
         self.pack = pack or TexturePack.get_pack("ascii")
@@ -30,15 +34,84 @@ class Display:
         lines = [line[:width] for line in lines]
         return "\n".join(lines)
 
-    def addstr(self, pad: Any, y: int, x: int, msg: str, *options) -> None:
+    def translate_color(self, color: Union[int, Tuple[int, int, int]]) -> int:
+        """
+        Translate a tuple (R, G, B) into a curses color index.
+        If we have already a color index, then nothing is processed.
+        If this is a tuple, we construct a new color index if non-existing
+        and we return this index.
+        The values of R, G and B must be between 0 and 1000, and not
+        between 0 and 255.
+        """
+        if isinstance(color, tuple):
+            # The color is a tuple (R, G, B), that is potentially unknown.
+            # We translate it into a curses color number.
+            if color not in self._colors_rgb:
+                # The color does not exist, we create it.
+                color_nb = len(self._colors_rgb) + 8
+                self.init_color(color_nb, color[0], color[1], color[2])
+                self._colors_rgb[color] = color_nb
+            color = self._colors_rgb[color]
+        return color
+
+    def addstr(self, pad: Any, y: int, x: int, msg: str,
+               fg_color: Union[int, Tuple[int, int, int]] = curses.COLOR_WHITE,
+               bg_color: Union[int, Tuple[int, int, int]] = curses.COLOR_BLACK,
+               *, altcharset: bool = False, blink: bool = False,
+               bold: bool = False, dim: bool = False, invis: bool = False,
+               italic: bool = False, normal: bool = False,
+               protect: bool = False, reverse: bool = False,
+               standout: bool = False, underline: bool = False,
+               horizontal: bool = False, left: bool = False,
+               low: bool = False, right: bool = False, top: bool = False,
+               vertical: bool = False, chartext: bool = False) -> None:
         """
         Display a message onto the pad.
         If the message is too large, it is truncated vertically and horizontally
+        The text can be bold, italic, blinking, ... if the good parameters are
+        given. These parameters are translated into curses attributes.
+        The foreground and background colors can be given as curses constants
+        (curses.COLOR_*), or by giving a tuple (R, G, B) that corresponds to
+        the color. R, G, B must be between 0 and 1000, and not 0 and 255.
         """
         height, width = pad.getmaxyx()
+        # Truncate message if it is too large
         msg = self.truncate(msg, height - y, width - x - 1)
         if msg.replace("\n", "") and x >= 0 and y >= 0:
-            return pad.addstr(y, x, msg, *options)
+            fg_color = self.translate_color(fg_color)
+            bg_color = self.translate_color(bg_color)
+
+            # Get the pair number for the tuple (fg, bg)
+            # If it does not exist, create it and give a new unique id.
+            if (fg_color, bg_color) in self._color_pairs:
+                pair_nb = self._color_pairs[(fg_color, bg_color)]
+            else:
+                pair_nb = len(self._color_pairs)
+                self.init_pair(pair_nb, fg_color, bg_color)
+                self._color_pairs[(fg_color, bg_color)] = pair_nb
+
+            # Compute curses attributes from the parameters
+            attr = self.color_pair(pair_nb)
+            attr |= curses.A_ALTCHARSET if altcharset else 0
+            attr |= curses.A_BLINK if blink else 0
+            attr |= curses.A_BOLD if bold else 0
+            attr |= curses.A_DIM if dim else 0
+            attr |= curses.A_INVIS if invis else 0
+            attr |= curses.A_ITALIC if italic else 0
+            attr |= curses.A_NORMAL if normal else 0
+            attr |= curses.A_PROTECT if protect else 0
+            attr |= curses.A_REVERSE if reverse else 0
+            attr |= curses.A_STANDOUT if standout else 0
+            attr |= curses.A_UNDERLINE if underline else 0
+            attr |= curses.A_HORIZONTAL if horizontal else 0
+            attr |= curses.A_LEFT if left else 0
+            attr |= curses.A_LOW if low else 0
+            attr |= curses.A_RIGHT if right else 0
+            attr |= curses.A_TOP if top else 0
+            attr |= curses.A_VERTICAL if vertical else 0
+            attr |= curses.A_CHARTEXT if chartext else 0
+
+            return pad.addstr(y, x, msg, attr)
 
     def init_pair(self, number: int, foreground: int, background: int) -> None:
         return curses.init_pair(number, foreground, background) \
@@ -47,6 +120,10 @@ class Display:
     def color_pair(self, number: int) -> int:
         return curses.color_pair(number) if self.screen else 0
 
+    def init_color(self, number: int, red: int, green: int, blue: int) -> None:
+        return curses.init_color(number, red, green, blue) \
+            if self.screen else None
+
     def resize(self, y: int, x: int, height: int, width: int,
                resize_pad: bool = True) -> None:
         self.x = x
@@ -55,6 +132,7 @@ class Display:
         self.height = height
         if hasattr(self, "pad") and resize_pad and \
                 self.height >= 0 and self.width >= 0:
+            self.pad.erase()
             self.pad.resize(self.height + 1, self.width + 1)
 
     def refresh(self, *args, resize_pad: bool = True) -> None:
@@ -86,6 +164,13 @@ class Display:
     def display(self) -> None:
         raise NotImplementedError
 
+    def handle_click(self, y: int, x: int, game: Game) -> None:
+        """
+        A mouse click was performed on the coordinates (y, x) of the pad.
+        Maybe it can do something.
+        """
+        pass
+
     @property
     def rows(self) -> int:
         return curses.LINES if self.screen else 42
@@ -138,23 +223,29 @@ class HorizontalSplit(Display):
 
 
 class Box(Display):
+    title: str = ""
+
+    def update_title(self, title: str) -> None:
+        self.title = title
 
     def __init__(self, *args, fg_border_color: Optional[int] = None, **kwargs):
         super().__init__(*args, **kwargs)
         self.pad = self.newpad(self.rows, self.cols)
         self.fg_border_color = fg_border_color or curses.COLOR_WHITE
 
-        pair_number = 4 + self.fg_border_color
-        self.init_pair(pair_number, self.fg_border_color, curses.COLOR_BLACK)
-        self.pair = self.color_pair(pair_number)
-
     def display(self) -> None:
         self.addstr(self.pad, 0, 0, "┏" + "━" * (self.width - 2) + "┓",
-                    self.pair)
+                    self.fg_border_color)
         for i in range(1, self.height - 1):
-            self.addstr(self.pad, i, 0, "┃", self.pair)
-            self.addstr(self.pad, i, self.width - 1, "┃", self.pair)
+            self.addstr(self.pad, i, 0, "┃", self.fg_border_color)
+            self.addstr(self.pad, i, self.width - 1, "┃", self.fg_border_color)
         self.addstr(self.pad, self.height - 1, 0,
-                    "┗" + "━" * (self.width - 2) + "┛", self.pair)
+                    "┗" + "━" * (self.width - 2) + "┛", self.fg_border_color)
+
+        if self.title:
+            self.addstr(self.pad, 0, (self.width - len(self.title) - 8) // 2,
+                        f" == {self.title} == ", curses.COLOR_GREEN,
+                        italic=True, bold=True)
+
         self.refresh_pad(self.pad, 0, 0, self.y, self.x,
                          self.y + self.height - 1, self.x + self.width - 1)
diff --git a/squirrelbattle/display/display_manager.py b/squirrelbattle/display/display_manager.py
index 0e9cf04..f9b3f01 100644
--- a/squirrelbattle/display/display_manager.py
+++ b/squirrelbattle/display/display_manager.py
@@ -2,15 +2,16 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 import curses
-from squirrelbattle.display.display import VerticalSplit, HorizontalSplit
+from squirrelbattle.display.display import VerticalSplit, HorizontalSplit, \
+    Display
 from squirrelbattle.display.mapdisplay import MapDisplay
 from squirrelbattle.display.messagedisplay import MessageDisplay
 from squirrelbattle.display.statsdisplay import StatsDisplay
 from squirrelbattle.display.menudisplay import MainMenuDisplay, \
-    InventoryDisplay, SettingsMenuDisplay
+    PlayerInventoryDisplay, StoreInventoryDisplay, SettingsMenuDisplay
 from squirrelbattle.display.logsdisplay import LogsDisplay
 from squirrelbattle.display.texturepack import TexturePack
-from typing import Any
+from typing import Any, List
 from squirrelbattle.game import Game, GameMode
 from squirrelbattle.enums import DisplayActions
 
@@ -24,7 +25,8 @@ class DisplayManager:
         self.mapdisplay = MapDisplay(screen, pack)
         self.statsdisplay = StatsDisplay(screen, pack)
         self.logsdisplay = LogsDisplay(screen, pack)
-        self.inventorydisplay = InventoryDisplay(screen, pack)
+        self.playerinventorydisplay = PlayerInventoryDisplay(screen, pack)
+        self.storeinventorydisplay = StoreInventoryDisplay(screen, pack)
         self.mainmenudisplay = MainMenuDisplay(self.game.main_menu,
                                                screen, pack)
         self.settingsmenudisplay = SettingsMenuDisplay(screen, pack)
@@ -33,28 +35,50 @@ class DisplayManager:
         self.vbar = VerticalSplit(screen, pack)
         self.displays = [self.statsdisplay, self.mapdisplay,
                          self.mainmenudisplay, self.settingsmenudisplay,
-                         self.logsdisplay, self.messagedisplay]
+                         self.logsdisplay, self.messagedisplay,
+                         self.playerinventorydisplay,
+                         self.storeinventorydisplay]
         self.update_game_components()
 
-    def handle_display_action(self, action: DisplayActions) -> None:
+    def handle_display_action(self, action: DisplayActions, *params) -> None:
         if action == DisplayActions.REFRESH:
             self.refresh()
         elif action == DisplayActions.UPDATE:
             self.update_game_components()
+        elif action == DisplayActions.MOUSE:
+            self.handle_mouse_click(*params)
 
     def update_game_components(self) -> None:
         for d in self.displays:
             d.pack = TexturePack.get_pack(self.game.settings.TEXTURE_PACK)
         self.mapdisplay.update_map(self.game.map)
         self.statsdisplay.update_player(self.game.player)
-        self.inventorydisplay.update_menu(self.game.inventory_menu)
+        self.game.inventory_menu.update_player(self.game.player)
+        self.game.store_menu.update_merchant(self.game.player)
+        self.playerinventorydisplay.update_menu(self.game.inventory_menu)
+        self.storeinventorydisplay.update_menu(self.game.store_menu)
         self.settingsmenudisplay.update_menu(self.game.settings_menu)
         self.logsdisplay.update_logs(self.game.logs)
         self.messagedisplay.update_message(self.game.message)
 
-    def refresh(self) -> None:
+    def handle_mouse_click(self, y: int, x: int) -> None:
+        displays = self.refresh()
+        display = None
+        for d in displays:
+            top_y, top_x, height, width = d.y, d.x, d.height, d.width
+            if top_y <= y < top_y + height and top_x <= x < top_x + width:
+                # The click coordinates correspond to the coordinates
+                # of that display
+                display = d
+        if display:
+            display.handle_click(y - display.y, x - display.x, self.game)
+
+    def refresh(self) -> List[Display]:
+        displays = []
+
         if self.game.state == GameMode.PLAY \
-                or self.game.state == GameMode.INVENTORY:
+                or self.game.state == GameMode.INVENTORY \
+                or self.game.state == GameMode.STORE:
             # The map pad has already the good size
             self.mapdisplay.refresh(0, 0, self.rows * 4 // 5,
                                     self.mapdisplay.pack.tile_width
@@ -67,15 +91,26 @@ class DisplayManager:
                                      self.rows // 5 - 1, self.cols * 4 // 5)
             self.hbar.refresh(self.rows * 4 // 5, 0, 1, self.cols * 4 // 5)
             self.vbar.refresh(0, self.cols * 4 // 5, self.rows, 1)
+
+            displays += [self.mapdisplay, self.statsdisplay, self.logsdisplay,
+                         self.hbar, self.vbar]
+
             if self.game.state == GameMode.INVENTORY:
-                self.inventorydisplay.refresh(self.rows // 10,
-                                              self.cols // 2,
-                                              8 * self.rows // 10,
-                                              2 * self.cols // 5)
+                self.playerinventorydisplay.refresh(
+                    self.rows // 10, self.cols // 2,
+                    8 * self.rows // 10, 2 * self.cols // 5)
+                displays.append(self.playerinventorydisplay)
+            elif self.game.state == GameMode.STORE:
+                self.storeinventorydisplay.refresh(
+                    self.rows // 10, self.cols // 2,
+                    8 * self.rows // 10, 2 * self.cols // 5)
+                displays.append(self.storeinventorydisplay)
         elif self.game.state == GameMode.MAINMENU:
             self.mainmenudisplay.refresh(0, 0, self.rows, self.cols)
+            displays.append(self.mainmenudisplay)
         elif self.game.state == GameMode.SETTINGS:
             self.settingsmenudisplay.refresh(0, 0, self.rows, self.cols)
+            displays.append(self.settingsmenudisplay)
 
         if self.game.message:
             height, width = 0, 0
@@ -84,9 +119,12 @@ class DisplayManager:
                 width = max(width, len(line))
             y, x = (self.rows - height) // 2, (self.cols - width) // 2
             self.messagedisplay.refresh(y, x, height, width)
+            displays.append(self.messagedisplay)
 
         self.resize_window()
 
+        return displays
+
     def resize_window(self) -> bool:
         """
         If the window got resized, ensure that the screen size got updated.
diff --git a/squirrelbattle/display/mapdisplay.py b/squirrelbattle/display/mapdisplay.py
index d403f7f..54d9432 100644
--- a/squirrelbattle/display/mapdisplay.py
+++ b/squirrelbattle/display/mapdisplay.py
@@ -15,15 +15,14 @@ class MapDisplay(Display):
         self.pad = self.newpad(m.height, self.pack.tile_width * m.width + 1)
 
     def update_pad(self) -> None:
-        self.init_pair(1, self.pack.tile_fg_color, self.pack.tile_bg_color)
-        self.init_pair(2, self.pack.entity_fg_color, self.pack.entity_bg_color)
         self.addstr(self.pad, 0, 0, self.map.draw_string(self.pack),
-                    self.color_pair(1))
+                    self.pack.tile_fg_color, self.pack.tile_bg_color)
         for e in self.map.entities:
             self.addstr(self.pad, e.y, self.pack.tile_width * e.x,
-                        self.pack[e.name.upper()], self.color_pair(2))
+                        self.pack[e.name.upper()],
+                        self.pack.entity_fg_color, self.pack.entity_bg_color)
 
-        # Display Path map for deubg purposes
+        # Display Path map for debug purposes
         # from squirrelbattle.entities.player import Player
         # players = [ p for p in self.map.entities if isinstance(p,Player) ]
         # player = players[0] if len(players) > 0 else None
@@ -42,7 +41,8 @@ class MapDisplay(Display):
         #                 else:
         #                     character = '←'
         #                 self.addstr(self.pad, y, self.pack.tile_width * x,
-        #                     character, self.color_pair(1))
+        #                     character, self.pack.tile_fg_color,
+        #                     self.pack.tile_bg_color)
 
     def display(self) -> None:
         y, x = self.map.currenty, self.pack.tile_width * self.map.currentx
diff --git a/squirrelbattle/display/menudisplay.py b/squirrelbattle/display/menudisplay.py
index d040d81..a00d0fe 100644
--- a/squirrelbattle/display/menudisplay.py
+++ b/squirrelbattle/display/menudisplay.py
@@ -1,15 +1,22 @@
 # Copyright (C) 2020 by ÿnérant, eichhornchen, nicomarg, charlse
 # SPDX-License-Identifier: GPL-3.0-or-later
+
 import curses
+from random import randint
 from typing import List
 
 from squirrelbattle.menus import Menu, MainMenu
-from .display import Display, Box
+from .display import Box, Display
+from ..enums import KeyValues
+from ..game import Game
 from ..resources import ResourceManager
 from ..translations import gettext as _
 
 
 class MenuDisplay(Display):
+    """
+    A class to display the menu objects
+    """
     position: int
 
     def __init__(self, *args, **kwargs):
@@ -24,9 +31,9 @@ class MenuDisplay(Display):
 
     def update_pad(self) -> None:
         for i in range(self.trueheight):
-            self.addstr(self.pad, i, 0, "  " + self.values[i])
+            self.addstr(self.pad, i, 0, "   " + self.values[i])
         # set a marker on the selected line
-        self.addstr(self.pad, self.menu.position, 0, ">")
+        self.addstr(self.pad, self.menu.position, 0, " >")
 
     def display(self) -> None:
         cornery = 0 if self.height - 2 >= self.menu.position - 1 \
@@ -37,10 +44,17 @@ class MenuDisplay(Display):
         self.menubox.refresh(self.y, self.x, self.height, self.width)
         self.pad.erase()
         self.update_pad()
-        self.refresh_pad(self.pad, cornery, 0, self.y + 1, self.x + 2,
+        self.refresh_pad(self.pad, cornery, 0, self.y + 1, self.x + 1,
                          self.height - 2 + self.y,
                          self.width - 2 + self.x)
 
+    def handle_click(self, y: int, x: int, game: Game) -> None:
+        """
+        We can select a menu item with the mouse.
+        """
+        self.menu.position = max(0, min(len(self.menu.values) - 1, y - 1))
+        game.handle_key_pressed(KeyValues.ENTER)
+
     @property
     def truewidth(self) -> int:
         return max([len(str(a)) for a in self.values])
@@ -63,6 +77,9 @@ class MenuDisplay(Display):
 
 
 class SettingsMenuDisplay(MenuDisplay):
+    """
+    A class to display specifically a settingsmenu object
+    """
     @property
     def values(self) -> List[str]:
         return [_(a[1][1]) + (" : "
@@ -73,6 +90,9 @@ class SettingsMenuDisplay(MenuDisplay):
 
 
 class MainMenuDisplay(Display):
+    """
+    A class to display specifically a mainmenu object
+    """
     def __init__(self, menu: MainMenu, *args):
         super().__init__(*args)
         self.menu = menu
@@ -83,13 +103,16 @@ class MainMenuDisplay(Display):
         self.pad = self.newpad(max(self.rows, len(self.title) + 30),
                                max(len(self.title[0]) + 5, self.cols))
 
+        self.fg_color = curses.COLOR_WHITE
+
         self.menudisplay = MenuDisplay(self.screen, self.pack)
         self.menudisplay.update_menu(self.menu)
 
     def display(self) -> None:
         for i in range(len(self.title)):
             self.addstr(self.pad, 4 + i, max(self.width // 2
-                        - len(self.title[0]) // 2 - 1, 0), self.title[i])
+                        - len(self.title[0]) // 2 - 1, 0), self.title[i],
+                        self.fg_color)
         self.refresh_pad(self.pad, 0, 0, self.y, self.x,
                          self.height + self.y - 1,
                          self.width + self.x - 1)
@@ -99,16 +122,25 @@ class MainMenuDisplay(Display):
             menuy, menux, min(self.menudisplay.preferred_height,
                               self.height - menuy), menuwidth)
 
+    def handle_click(self, y: int, x: int, game: Game) -> None:
+        menuwidth = min(self.menudisplay.preferred_width, self.width)
+        menuy, menux = len(self.title) + 8, self.width // 2 - menuwidth // 2 - 1
+        menuheight = min(self.menudisplay.preferred_height, self.height - menuy)
 
-class InventoryDisplay(MenuDisplay):
+        if menuy <= y < menuy + menuheight and menux <= x < menux + menuwidth:
+            self.menudisplay.handle_click(y - menuy, x - menux, game)
+
+        if y <= len(self.title):
+            self.fg_color = randint(0, 1000), randint(0, 1000), randint(0, 1000)
+
+
+class PlayerInventoryDisplay(MenuDisplay):
     def update_pad(self) -> None:
-        message = _("== INVENTORY ==")
-        self.addstr(self.pad, 0, (self.width - len(message)) // 2, message,
-                    curses.A_BOLD | curses.A_ITALIC)
+        self.menubox.update_title(_("INVENTORY"))
         for i, item in enumerate(self.menu.values):
             rep = self.pack[item.name.upper()]
             selection = f"[{rep}]" if i == self.menu.position else f" {rep} "
-            self.addstr(self.pad, 2 + i, 0, selection
+            self.addstr(self.pad, i + 1, 0, selection
                         + " " + item.translated_name.capitalize())
 
     @property
@@ -118,3 +150,36 @@ class InventoryDisplay(MenuDisplay):
     @property
     def trueheight(self) -> int:
         return 2 + super().trueheight
+
+    def handle_click(self, y: int, x: int, game: Game) -> None:
+        """
+        We can select a menu item with the mouse.
+        """
+        self.menu.position = max(0, min(len(self.menu.values) - 1, y - 2))
+        game.handle_key_pressed(KeyValues.ENTER)
+
+
+class StoreInventoryDisplay(MenuDisplay):
+    def update_pad(self) -> None:
+        self.menubox.update_title(_("STALL"))
+        for i, item in enumerate(self.menu.values):
+            rep = self.pack[item.name.upper()]
+            selection = f"[{rep}]" if i == self.menu.position else f" {rep} "
+            self.addstr(self.pad, i + 1, 0, selection
+                        + " " + item.translated_name.capitalize()
+                        + ": " + str(item.price) + " Hazels")
+
+    @property
+    def truewidth(self) -> int:
+        return max(1, self.height if hasattr(self, "height") else 10)
+
+    @property
+    def trueheight(self) -> int:
+        return 2 + super().trueheight
+
+    def handle_click(self, y: int, x: int, game: Game) -> None:
+        """
+        We can select a menu item with the mouse.
+        """
+        self.menu.position = max(0, min(len(self.menu.values) - 1, y - 2))
+        game.handle_key_pressed(KeyValues.ENTER)
diff --git a/squirrelbattle/display/messagedisplay.py b/squirrelbattle/display/messagedisplay.py
index bcc2539..32f7139 100644
--- a/squirrelbattle/display/messagedisplay.py
+++ b/squirrelbattle/display/messagedisplay.py
@@ -25,7 +25,7 @@ class MessageDisplay(Display):
                          self.height + 2, self.width + 4)
         self.box.display()
         self.pad.erase()
-        self.addstr(self.pad, 0, 0, self.message, curses.A_BOLD)
+        self.addstr(self.pad, 0, 0, self.message, bold=True)
         self.refresh_pad(self.pad, 0, 0, self.y, self.x,
                          self.height + self.y - 1,
                          self.width + self.x - 1)
diff --git a/squirrelbattle/display/statsdisplay.py b/squirrelbattle/display/statsdisplay.py
index ac1a89c..9937c3e 100644
--- a/squirrelbattle/display/statsdisplay.py
+++ b/squirrelbattle/display/statsdisplay.py
@@ -14,7 +14,6 @@ class StatsDisplay(Display):
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.pad = self.newpad(self.rows, self.cols)
-        self.init_pair(3, curses.COLOR_RED, curses.COLOR_BLACK)
 
     def update_player(self, p: Player) -> None:
         self.player = p
@@ -46,10 +45,12 @@ class StatsDisplay(Display):
             printed_items.append(item)
         self.addstr(self.pad, 8, 0, inventory_str)
 
+        self.addstr(self.pad, 9, 0, f"{self.pack.HAZELNUT} "
+                                    f"x{self.player.hazel}")
+
         if self.player.dead:
-            self.addstr(self.pad, 10, 0, _("YOU ARE DEAD"),
-                        curses.A_BOLD | curses.A_BLINK | curses.A_STANDOUT
-                        | self.color_pair(3))
+            self.addstr(self.pad, 11, 0, _("YOU ARE DEAD"), curses.COLOR_RED,
+                        bold=True, blink=True, standout=True)
 
     def display(self) -> None:
         self.pad.erase()
diff --git a/squirrelbattle/display/texturepack.py b/squirrelbattle/display/texturepack.py
index 7fc4a9a..f72cd97 100644
--- a/squirrelbattle/display/texturepack.py
+++ b/squirrelbattle/display/texturepack.py
@@ -14,10 +14,22 @@ class TexturePack:
     tile_bg_color: int
     entity_fg_color: int
     entity_bg_color: int
+
+    BODY_SNATCH_POTION: str
+    BOMB: str
+    HEART: str
+    HEDGEHOG: str
     EMPTY: str
-    WALL: str
     FLOOR: str
+    HAZELNUT: str
+    MERCHANT: str
     PLAYER: str
+    RABBIT: str
+    SUNFLOWER: str
+    SWORD: str
+    TEDDY_BEAR: str
+    TIGER: str
+    WALL: str
 
     ASCII_PACK: "TexturePack"
     SQUIRREL_PACK: "TexturePack"
@@ -46,17 +58,23 @@ TexturePack.ASCII_PACK = TexturePack(
     tile_bg_color=curses.COLOR_BLACK,
     entity_fg_color=curses.COLOR_WHITE,
     entity_bg_color=curses.COLOR_BLACK,
-    EMPTY=' ',
-    WALL='#',
-    FLOOR='.',
-    PLAYER='@',
-    HEDGEHOG='*',
-    HEART='❤',
-    BOMB='o',
-    RABBIT='Y',
-    TIGER='n',
-    TEDDY_BEAR='8',
+
     BODY_SNATCH_POTION='S',
+    BOMB='o',
+    EMPTY=' ',
+    EXPLOSION='%',
+    FLOOR='.',
+    HAZELNUT='¤',
+    HEART='❤',
+    HEDGEHOG='*',
+    MERCHANT='M',
+    PLAYER='@',
+    RABBIT='Y',
+    SUNFLOWER='I',
+    SWORD='\u2020',
+    TEDDY_BEAR='8',
+    TIGER='n',
+    WALL='#',
 )
 
 TexturePack.SQUIRREL_PACK = TexturePack(
@@ -66,15 +84,21 @@ TexturePack.SQUIRREL_PACK = TexturePack(
     tile_bg_color=curses.COLOR_BLACK,
     entity_fg_color=curses.COLOR_WHITE,
     entity_bg_color=curses.COLOR_WHITE,
-    EMPTY='  ',
-    WALL='🧱',
-    FLOOR='██',
-    PLAYER='🐿️ ️',
-    HEDGEHOG='🦔',
-    HEART='💜',
-    BOMB='💣',
-    RABBIT='🐇',
-    TIGER='🐅',
-    TEDDY_BEAR='🧸',
+
     BODY_SNATCH_POTION='🔀',
+    BOMB='💣',
+    EMPTY='  ',
+    EXPLOSION='💥',
+    FLOOR='██',
+    HAZELNUT='🌰',
+    HEART='💜',
+    HEDGEHOG='🦔',
+    PLAYER='🐿️ ️',
+    MERCHANT='🦜',
+    RABBIT='🐇',
+    SUNFLOWER='🌻',
+    SWORD='🗡️',
+    TEDDY_BEAR='🧸',
+    TIGER='🐅',
+    WALL='🧱',
 )
diff --git a/squirrelbattle/entities/friendly.py b/squirrelbattle/entities/friendly.py
new file mode 100644
index 0000000..6c99090
--- /dev/null
+++ b/squirrelbattle/entities/friendly.py
@@ -0,0 +1,52 @@
+from ..interfaces import FriendlyEntity, InventoryHolder
+from ..translations import gettext as _
+from .player import Player
+from .items import Item
+from random import choice
+
+
+class Merchant(InventoryHolder, FriendlyEntity):
+    """
+    The class for merchants in the dungeon
+    """
+    def keys(self) -> list:
+        """
+        Returns a friendly entitie's specific attributes
+        """
+        return super().keys() + ["inventory", "hazel"]
+
+    def __init__(self, name: str = "merchant", inventory: list = None,
+                 hazel: int = 75, *args, **kwargs):
+        super().__init__(name=name, *args, **kwargs)
+        self.inventory = self.translate_inventory(inventory or [])
+        self.hazel = hazel
+
+        if not self.inventory:
+            for i in range(5):
+                self.inventory.append(choice(Item.get_all_items())())
+
+    def talk_to(self, player: Player) -> str:
+        """
+        This function is used to open the merchant's inventory in a menu,
+        and allow the player to buy/sell objects
+        """
+        return _("I don't sell any squirrel")
+
+    def change_hazel_balance(self, hz: int) -> None:
+        """
+        Change the number of hazel the merchant has by hz.
+        """
+        self.hazel += hz
+
+
+class Sunflower(FriendlyEntity):
+    """
+    A friendly sunflower
+    """
+    def __init__(self, maxhealth: int = 15,
+                 *args, **kwargs) -> None:
+        super().__init__(name="sunflower", maxhealth=maxhealth, *args, **kwargs)
+
+    @property
+    def dialogue_option(self) -> list:
+        return [_("Flower power!!"), _("The sun is warm today")]
diff --git a/squirrelbattle/entities/items.py b/squirrelbattle/entities/items.py
index e90ec32..865a703 100644
--- a/squirrelbattle/entities/items.py
+++ b/squirrelbattle/entities/items.py
@@ -5,7 +5,7 @@ from random import choice, randint
 from typing import Optional
 
 from .player import Player
-from ..interfaces import Entity, FightingEntity, Map
+from ..interfaces import Entity, FightingEntity, Map, InventoryHolder
 from ..translations import gettext as _
 
 
@@ -14,13 +14,16 @@ class Item(Entity):
     A class for items
     """
     held: bool
-    held_by: Optional[Player]
+    held_by: Optional[InventoryHolder]
+    price: int
 
-    def __init__(self, held: bool = False, held_by: Optional[Player] = None,
-                 *args, **kwargs):
+    def __init__(self, held: bool = False,
+                 held_by: Optional[InventoryHolder] = None,
+                 price: int = 2, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.held = held
         self.held_by = held_by
+        self.price = price
 
     def drop(self) -> None:
         """
@@ -28,7 +31,7 @@ class Item(Entity):
         """
         if self.held:
             self.held_by.inventory.remove(self)
-            self.map.add_entity(self)
+            self.held_by.map.add_entity(self)
             self.move(self.held_by.y, self.held_by.x)
             self.held = False
             self.held_by = None
@@ -43,14 +46,14 @@ class Item(Entity):
         Indicates what should be done when the item is equipped.
         """
 
-    def hold(self, player: "Player") -> None:
+    def hold(self, player: InventoryHolder) -> None:
         """
         The item is taken from the floor and put into the inventory
         """
         self.held = True
         self.held_by = player
-        self.map.remove_entity(self)
-        player.inventory.append(self)
+        self.held_by.map.remove_entity(self)
+        player.add_to_inventory(self)
 
     def save_state(self) -> dict:
         """
@@ -60,6 +63,25 @@ class Item(Entity):
         d["held"] = self.held
         return d
 
+    @staticmethod
+    def get_all_items() -> list:
+        return [BodySnatchPotion, Bomb, Heart, Sword]
+
+    def be_sold(self, buyer: InventoryHolder, seller: InventoryHolder) -> bool:
+        """
+        Does all necessary actions when an object is to be sold.
+        Is overwritten by some classes that cannot exist in the player's
+        inventory
+        """
+        if buyer.hazel >= self.price:
+            self.hold(buyer)
+            seller.remove_from_inventory(self)
+            buyer.change_hazel_balance(-self.price)
+            seller.change_hazel_balance(self.price)
+            return True
+        else:
+            return False
+
 
 class Heart(Item):
     """
@@ -67,16 +89,17 @@ class Heart(Item):
     """
     healing: int
 
-    def __init__(self, name: str = "heart", healing: int = 5, *args, **kwargs):
-        super().__init__(name=name, *args, **kwargs)
+    def __init__(self, name: str = "heart", healing: int = 5, price: int = 3,
+                 *args, **kwargs):
+        super().__init__(name=name, price=price, *args, **kwargs)
         self.healing = healing
 
-    def hold(self, player: "Player") -> None:
+    def hold(self, entity: InventoryHolder) -> None:
         """
         When holding a heart, heal the player and don't put item in inventory.
         """
-        player.health = min(player.maxhealth, player.health + self.healing)
-        self.map.remove_entity(self)
+        entity.health = min(entity.maxhealth, entity.health + self.healing)
+        entity.map.remove_entity(self)
 
     def save_state(self) -> dict:
         """
@@ -97,8 +120,8 @@ class Bomb(Item):
     tick: int
 
     def __init__(self, name: str = "bomb", damage: int = 5,
-                 exploding: bool = False, *args, **kwargs):
-        super().__init__(name=name, *args, **kwargs)
+                 exploding: bool = False, price: int = 4, *args, **kwargs):
+        super().__init__(name=name, price=price, *args, **kwargs)
         self.damage = damage
         self.exploding = exploding
         self.tick = 4
@@ -135,6 +158,10 @@ class Bomb(Item):
                 m.logs.add_message(log_message)
                 m.entities.remove(self)
 
+                # Add sparkles where the bomb exploded.
+                explosion = Explosion(y=self.y, x=self.x)
+                self.map.add_entity(explosion)
+
     def save_state(self) -> dict:
         """
         Saves the state of the bomb into a dictionary
@@ -145,14 +172,63 @@ class Bomb(Item):
         return d
 
 
+class Explosion(Item):
+    """
+    When a bomb explodes, the explosion is displayed.
+    """
+    def __init__(self, *args, **kwargs):
+        super().__init__(name="explosion", *args, **kwargs)
+
+    def act(self, m: Map) -> None:
+        """
+        The explosion instant dies.
+        """
+        m.remove_entity(self)
+
+    def hold(self, player: InventoryHolder) -> None:
+        """
+        The player can't hold any explosion.
+        """
+        pass
+
+
+class Weapon(Item):
+    """
+    Non-throwable items that improve player damage
+    """
+    damage: int
+
+    def __init__(self, damage: int = 3, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.damage = damage
+
+    def save_state(self) -> dict:
+        """
+        Saves the state of the weapon into a dictionary
+        """
+        d = super().save_state()
+        d["damage"] = self.damage
+        return d
+
+
+class Sword(Weapon):
+    """
+    A basic weapon
+    """
+    def __init__(self, name: str = "sword", price: int = 20, *args, **kwargs):
+        super().__init__(name=name, price=price, *args, **kwargs)
+        self.name = name
+
+
 class BodySnatchPotion(Item):
     """
     The body-snatch potion allows to exchange all characteristics with a random
     other entity.
     """
 
-    def __init__(self, name: str = "body_snatch_potion", *args, **kwargs):
-        super().__init__(name=name, *args, **kwargs)
+    def __init__(self, name: str = "body_snatch_potion", price: int = 14,
+                 *args, **kwargs):
+        super().__init__(name=name, price=price, *args, **kwargs)
 
     def use(self) -> None:
         """
diff --git a/squirrelbattle/entities/player.py b/squirrelbattle/entities/player.py
index 45e2bdf..19c8348 100644
--- a/squirrelbattle/entities/player.py
+++ b/squirrelbattle/entities/player.py
@@ -6,23 +6,22 @@ from queue import PriorityQueue
 from random import randint
 from typing import Dict, Tuple
 
-from ..interfaces import FightingEntity
+from ..interfaces import FightingEntity, InventoryHolder
 
 
-class Player(FightingEntity):
+class Player(InventoryHolder, FightingEntity):
     """
     The class of the player
     """
     current_xp: int = 0
     max_xp: int = 10
-    inventory: list
     paths: Dict[Tuple[int, int], Tuple[int, int]]
 
     def __init__(self, name: str = "player", maxhealth: int = 20,
                  strength: int = 5, intelligence: int = 1, charisma: int = 1,
                  dexterity: int = 1, constitution: int = 1, level: int = 1,
                  current_xp: int = 0, max_xp: int = 10, inventory: list = None,
-                 *args, **kwargs) \
+                 hazel: int = 42, *args, **kwargs) \
             -> None:
         super().__init__(name=name, maxhealth=maxhealth, strength=strength,
                          intelligence=intelligence, charisma=charisma,
@@ -30,13 +29,9 @@ class Player(FightingEntity):
                          level=level, *args, **kwargs)
         self.current_xp = current_xp
         self.max_xp = max_xp
-        self.inventory = inventory if inventory else list()
-        for i in range(len(self.inventory)):
-            if isinstance(self.inventory[i], dict):
-                entity_classes = self.get_all_entity_classes_in_a_dict()
-                item_class = entity_classes[self.inventory[i]["type"]]
-                self.inventory[i] = item_class(**self.inventory[i])
+        self.inventory = self.translate_inventory(inventory or [])
         self.paths = dict()
+        self.hazel = hazel
 
     def move(self, y: int, x: int) -> None:
         """
@@ -149,5 +144,4 @@ class Player(FightingEntity):
         d = super().save_state()
         d["current_xp"] = self.current_xp
         d["max_xp"] = self.max_xp
-        d["inventory"] = [item.save_state() for item in self.inventory]
         return d
diff --git a/squirrelbattle/enums.py b/squirrelbattle/enums.py
index 84eb498..7e4efa4 100644
--- a/squirrelbattle/enums.py
+++ b/squirrelbattle/enums.py
@@ -16,6 +16,7 @@ class DisplayActions(Enum):
     """
     REFRESH = auto()
     UPDATE = auto()
+    MOUSE = auto()
 
 
 class GameMode(Enum):
@@ -26,12 +27,14 @@ class GameMode(Enum):
     PLAY = auto()
     SETTINGS = auto()
     INVENTORY = auto()
+    STORE = auto()
 
 
 class KeyValues(Enum):
     """
     Key values options used in the game
     """
+    MOUSE = auto()
     UP = auto()
     DOWN = auto()
     LEFT = auto()
@@ -42,6 +45,8 @@ class KeyValues(Enum):
     EQUIP = auto()
     DROP = auto()
     SPACE = auto()
+    CHAT = auto()
+    WAIT = auto()
 
     @staticmethod
     def translate_key(key: str, settings: Settings) -> Optional["KeyValues"]:
@@ -72,4 +77,8 @@ class KeyValues(Enum):
             return KeyValues.DROP
         elif key == ' ':
             return KeyValues.SPACE
+        elif key == settings.KEY_CHAT:
+            return KeyValues.CHAT
+        elif key == settings.KEY_WAIT:
+            return KeyValues.WAIT
         return None
diff --git a/squirrelbattle/game.py b/squirrelbattle/game.py
index 6d9e9e7..ed3b60f 100644
--- a/squirrelbattle/game.py
+++ b/squirrelbattle/game.py
@@ -4,6 +4,7 @@
 from json import JSONDecodeError
 from random import randint
 from typing import Any, Optional
+import curses
 import json
 import os
 import sys
@@ -15,7 +16,6 @@ from .resources import ResourceManager
 from .settings import Settings
 from . import menus
 from .translations import gettext as _, Translator
-from typing import Callable
 
 
 class Game:
@@ -24,14 +24,16 @@ class Game:
     """
     map: Map
     player: Player
+    screen: Any
     # display_actions is a display interface set by the bootstrapper
-    display_actions: Callable[[DisplayActions], None]
+    display_actions: callable
 
     def __init__(self) -> None:
         """
         Init the game.
         """
         self.state = GameMode.MAINMENU
+        self.waiting_for_friendly_key = False
         self.settings = Settings()
         self.settings.load_settings()
         self.settings.write_settings()
@@ -40,6 +42,7 @@ class Game:
         self.settings_menu = menus.SettingsMenu()
         self.settings_menu.update_values(self.settings)
         self.inventory_menu = menus.InventoryMenu()
+        self.store_menu = menus.StoreMenu()
         self.logs = Logs()
         self.message = None
 
@@ -68,8 +71,12 @@ class Game:
             screen.refresh()
             self.display_actions(DisplayActions.REFRESH)
             key = screen.getkey()
-            self.handle_key_pressed(
-                KeyValues.translate_key(key, self.settings), key)
+            if key == "KEY_MOUSE":
+                _ignored1, x, y, _ignored2, _ignored3 = curses.getmouse()
+                self.display_actions(DisplayActions.MOUSE, y, x)
+            else:
+                self.handle_key_pressed(
+                    KeyValues.translate_key(key, self.settings), key)
 
     def handle_key_pressed(self, key: Optional[KeyValues], raw_key: str = '')\
             -> None:
@@ -83,13 +90,19 @@ class Game:
             return
 
         if self.state == GameMode.PLAY:
-            self.handle_key_pressed_play(key)
+            if self.waiting_for_friendly_key:
+                # The player requested to talk with a friendly entity
+                self.handle_friendly_entity_chat(key)
+            else:
+                self.handle_key_pressed_play(key)
         elif self.state == GameMode.INVENTORY:
             self.handle_key_pressed_inventory(key)
         elif self.state == GameMode.MAINMENU:
             self.handle_key_pressed_main_menu(key)
         elif self.state == GameMode.SETTINGS:
             self.settings_menu.handle_key_pressed(key, raw_key, self)
+        elif self.state == GameMode.STORE:
+            self.handle_key_pressed_store(key)
         self.display_actions(DisplayActions.REFRESH)
 
     def handle_key_pressed_play(self, key: KeyValues) -> None:
@@ -112,6 +125,44 @@ class Game:
             self.state = GameMode.INVENTORY
         elif key == KeyValues.SPACE:
             self.state = GameMode.MAINMENU
+        elif key == KeyValues.CHAT:
+            # Wait for the direction of the friendly entity
+            self.waiting_for_friendly_key = True
+        elif key == KeyValues.WAIT:
+            self.map.tick()
+
+    def handle_friendly_entity_chat(self, key: KeyValues) -> None:
+        """
+        If the player is talking to a friendly entity, we get the direction
+        where the entity is, then we interact with it.
+        """
+        if not self.waiting_for_friendly_key:
+            return
+        self.waiting_for_friendly_key = False
+
+        if key == KeyValues.UP:
+            xp = self.player.x
+            yp = self.player.y - 1
+        elif key == KeyValues.DOWN:
+            xp = self.player.x
+            yp = self.player.y + 1
+        elif key == KeyValues.LEFT:
+            xp = self.player.x - 1
+            yp = self.player.y
+        elif key == KeyValues.RIGHT:
+            xp = self.player.x + 1
+            yp = self.player.y
+        else:
+            return
+        if self.map.entity_is_present(yp, xp):
+            for entity in self.map.entities:
+                if entity.is_friendly() and entity.x == xp and \
+                        entity.y == yp:
+                    msg = entity.talk_to(self.player)
+                    self.logs.add_message(msg)
+                    if entity.is_merchant():
+                        self.state = GameMode.STORE
+                        self.store_menu.update_merchant(entity)
 
     def handle_key_pressed_inventory(self, key: KeyValues) -> None:
         """
@@ -136,6 +187,27 @@ class Game:
                                                len(self.inventory_menu.values)
                                                - 1)
 
+    def handle_key_pressed_store(self, key: KeyValues) -> None:
+        """
+        In a store menu, we can buy items or close the menu.
+        """
+        if key == KeyValues.SPACE:
+            self.state = GameMode.PLAY
+        elif key == KeyValues.UP:
+            self.store_menu.go_up()
+        elif key == KeyValues.DOWN:
+            self.store_menu.go_down()
+        if self.store_menu.values and not self.player.dead:
+            if key == KeyValues.ENTER:
+                item = self.store_menu.validate()
+                flag = item.be_sold(self.player, self.store_menu.merchant)
+                if not flag:
+                    self.message = _("You do not have enough money")
+                    self.display_actions(DisplayActions.UPDATE)
+            # Ensure that the cursor has a good position
+            self.store_menu.position = min(self.store_menu.position,
+                                           len(self.store_menu.values) - 1)
+
     def handle_key_pressed_main_menu(self, key: KeyValues) -> None:
         """
         In the main menu, we can navigate through options.
diff --git a/squirrelbattle/interfaces.py b/squirrelbattle/interfaces.py
index 91a2188..6458df7 100644
--- a/squirrelbattle/interfaces.py
+++ b/squirrelbattle/interfaces.py
@@ -4,7 +4,7 @@
 from enum import Enum, auto
 from math import sqrt
 from random import choice, randint
-from typing import List, Optional, Union, Tuple
+from typing import List, Optional, Union, Tuple, Any
 
 from .display.texturepack import TexturePack
 from .translations import gettext as _
@@ -93,7 +93,8 @@ class Map:
         """
         Unregister an entity from the map.
         """
-        self.entities.remove(entity)
+        if entity in self.entities:
+            self.entities.remove(entity)
 
     def find_entities(self, entity_class: type) -> list:
         return [entity for entity in self.entities
@@ -101,12 +102,21 @@ class Map:
 
     def is_free(self, y: int, x: int) -> bool:
         """
-        Indicates that the case at the coordinates (y, x) is empty.
+        Indicates that the tile at the coordinates (y, x) is empty.
         """
         return 0 <= y < self.height and 0 <= x < self.width and \
             self.tiles[y][x].can_walk() and \
             not any(entity.x == x and entity.y == y for entity in self.entities)
 
+    def entity_is_present(self, y: int, x: int) -> bool:
+        """
+        Indicates that the tile at the coordinates (y, x) contains a killable
+        entity
+        """
+        return 0 <= y < self.height and 0 <= x < self.width and \
+            any(entity.x == x and entity.y == y and entity.is_friendly()
+                for entity in self.entities)
+
     @staticmethod
     def load(filename: str) -> "Map":
         """
@@ -152,7 +162,7 @@ class Map:
 
     def spawn_random_entities(self, count: int) -> None:
         """
-        Put randomly {count} hedgehogs on the map, where it is available.
+        Put randomly {count} entities on the map, where it is available.
         """
         for _ignored in range(count):
             y, x = 0, 0
@@ -459,20 +469,34 @@ class Entity:
         from squirrelbattle.entities.items import Item
         return isinstance(self, Item)
 
+    def is_friendly(self) -> bool:
+        """
+        Is this entity a friendly entity?
+        """
+        return isinstance(self, FriendlyEntity)
+
+    def is_merchant(self) -> bool:
+        """
+        Is this entity a merchant?
+        """
+        from squirrelbattle.entities.friendly import Merchant
+        return isinstance(self, Merchant)
+
     @property
     def translated_name(self) -> str:
         return _(self.name.replace("_", " "))
 
     @staticmethod
-    def get_all_entity_classes():
+    def get_all_entity_classes() -> list:
         """
         Returns all entities subclasses
         """
         from squirrelbattle.entities.items import BodySnatchPotion, Bomb, Heart
         from squirrelbattle.entities.monsters import Tiger, Hedgehog, \
             Rabbit, TeddyBear
-        return [BodySnatchPotion, Bomb, Heart, Hedgehog,
-                Rabbit, TeddyBear, Tiger]
+        from squirrelbattle.entities.friendly import Merchant, Sunflower
+        return [BodySnatchPotion, Bomb, Heart, Hedgehog, Rabbit, TeddyBear,
+                Sunflower, Tiger, Merchant]
 
     @staticmethod
     def get_all_entity_classes_in_a_dict() -> dict:
@@ -482,7 +506,9 @@ class Entity:
         from squirrelbattle.entities.player import Player
         from squirrelbattle.entities.monsters import Tiger, Hedgehog, Rabbit, \
             TeddyBear
-        from squirrelbattle.entities.items import BodySnatchPotion, Bomb, Heart
+        from squirrelbattle.entities.friendly import Merchant, Sunflower
+        from squirrelbattle.entities.items import BodySnatchPotion, Bomb, \
+            Heart, Sword
         return {
             "Tiger": Tiger,
             "Bomb": Bomb,
@@ -492,6 +518,9 @@ class Entity:
             "Rabbit": Rabbit,
             "TeddyBear": TeddyBear,
             "Player": Player,
+            "Merchant": Merchant,
+            "Sunflower": Sunflower,
+            "Sword": Sword,
         }
 
     def save_state(self) -> dict:
@@ -567,7 +596,7 @@ class FightingEntity(Entity):
 
     def keys(self) -> list:
         """
-        Returns a fighting entities specific attributes
+        Returns a fighting entity's specific attributes
         """
         return ["name", "maxhealth", "health", "level", "strength",
                 "intelligence", "charisma", "dexterity", "constitution"]
@@ -580,3 +609,74 @@ class FightingEntity(Entity):
         for name in self.keys():
             d[name] = getattr(self, name)
         return d
+
+
+class FriendlyEntity(FightingEntity):
+    """
+    Friendly entities are living entities which do not attack the player
+    """
+    dialogue_option: list
+
+    def talk_to(self, player: Any) -> str:
+        return _("{entity} said: {message}").format(
+            entity=self.translated_name.capitalize(),
+            message=choice(self.dialogue_option))
+
+    def keys(self) -> list:
+        """
+        Returns a friendly entity's specific attributes
+        """
+        return ["maxhealth", "health"]
+
+
+class InventoryHolder(Entity):
+    hazel: int  # Currency of the game
+    inventory: list
+
+    def translate_inventory(self, inventory: list) -> list:
+        """
+        Translate the JSON-state of the inventory into a list of the items in
+        the inventory.
+        """
+        for i in range(len(inventory)):
+            if isinstance(inventory[i], dict):
+                inventory[i] = self.dict_to_inventory(inventory[i])
+        return inventory
+
+    def dict_to_inventory(self, item_dict: dict) -> Entity:
+        """
+        Translate a dict object that contains the state of an item
+        into an item object.
+        """
+        entity_classes = self.get_all_entity_classes_in_a_dict()
+
+        item_class = entity_classes[item_dict["type"]]
+        return item_class(**item_dict)
+
+    def save_state(self) -> dict:
+        """
+        We save the inventory of the merchant formatted as JSON
+        """
+        d = super().save_state()
+        d["hazel"] = self.hazel
+        d["inventory"] = [item.save_state() for item in self.inventory]
+        return d
+
+    def add_to_inventory(self, obj: Any) -> None:
+        """
+        Adds an object to inventory
+        """
+        self.inventory.append(obj)
+
+    def remove_from_inventory(self, obj: Any) -> None:
+        """
+        Removes an object from the inventory
+        """
+        self.inventory.remove(obj)
+
+    def change_hazel_balance(self, hz: int) -> None:
+        """
+        Change the number of hazel the entity has by hz. hz is negative
+        when the player loses money and positive when he gains money
+        """
+        self.hazel += hz
diff --git a/squirrelbattle/locale/de/LC_MESSAGES/squirrelbattle.po b/squirrelbattle/locale/de/LC_MESSAGES/squirrelbattle.po
index 38d16a6..39cfeec 100644
--- a/squirrelbattle/locale/de/LC_MESSAGES/squirrelbattle.po
+++ b/squirrelbattle/locale/de/LC_MESSAGES/squirrelbattle.po
@@ -1,12 +1,14 @@
-# German translation of Squirrel Battle
-# Copyright (C) YEAR ÿnérant, eichhornchen, nicomarg, charlse
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR ÿnérant, eichhornchen, nicomarg, charlse, ifugao
 # This file is distributed under the same license as the squirrelbattle package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
 #
+#, fuzzy
 msgid ""
 msgstr ""
 "Project-Id-Version: squirrelbattle 3.14.1\n"
 "Report-Msgid-Bugs-To: squirrel-battle@crans.org\n"
-"POT-Creation-Date: 2020-12-05 14:46+0100\n"
+"POT-Creation-Date: 2020-12-12 18:02+0100\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -15,31 +17,52 @@ msgstr ""
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
 
-#: squirrelbattle/display/menudisplay.py:105
-msgid "== INVENTORY =="
-msgstr "== BESTAND =="
+#: squirrelbattle/display/menudisplay.py:139
+msgid "INVENTORY"
+msgstr "BESTAND"
 
-#: squirrelbattle/display/statsdisplay.py:34
+#: squirrelbattle/display/menudisplay.py:164
+msgid "STALL"
+msgstr "STAND"
+
+#: squirrelbattle/display/statsdisplay.py:33
 msgid "Inventory:"
 msgstr "Bestand:"
 
-#: squirrelbattle/display/statsdisplay.py:50
+#: squirrelbattle/display/statsdisplay.py:52
 msgid "YOU ARE DEAD"
 msgstr "SIE WURDEN GESTORBEN"
 
+#. TODO
+#: squirrelbattle/entities/friendly.py:33
+msgid "I don't sell any squirrel"
+msgstr "Ich verkaufe keinen Eichhörnchen."
+
+#: squirrelbattle/entities/friendly.py:52
+msgid "Flower power!!"
+msgstr "Blumenmacht!!"
+
+#: squirrelbattle/entities/friendly.py:52
+msgid "The sun is warm today"
+msgstr "Die Sonne ist warm heute"
+
 #. The bomb is exploding.
 #. Each entity that is close to the bomb takes damages.
 #. The player earn XP if the entity was killed.
-#: squirrelbattle/entities/items.py:128
+#: squirrelbattle/entities/items.py:151
 msgid "Bomb is exploding."
 msgstr "Die Bombe explodiert."
 
-#: squirrelbattle/entities/items.py:172
+#: squirrelbattle/entities/items.py:248
 #, python-brace-format
 msgid "{player} exchanged its body with {entity}."
 msgstr "{player} täuscht seinem Körper mit {entity} aus."
 
-#: squirrelbattle/game.py:177
+#: squirrelbattle/game.py:205 squirrelbattle/tests/game_test.py:573
+msgid "You do not have enough money"
+msgstr "Sie haben nicht genug Geld"
+
+#: squirrelbattle/game.py:249
 msgid ""
 "Some keys are missing in your save file.\n"
 "Your save seems to be corrupt. It got deleted."
@@ -47,7 +70,7 @@ msgstr ""
 "In Ihrer Speicherdatei fehlen einige Schlüssel.\n"
 "Ihre Speicherung scheint korrupt zu sein. Es wird gelöscht."
 
-#: squirrelbattle/game.py:185
+#: squirrelbattle/game.py:257
 msgid ""
 "No player was found on this map!\n"
 "Maybe you died?"
@@ -55,7 +78,7 @@ msgstr ""
 "Auf dieser Karte wurde kein Spieler gefunden!\n"
 "Vielleicht sind Sie gestorben?"
 
-#: squirrelbattle/game.py:205
+#: squirrelbattle/game.py:277
 msgid ""
 "The JSON file is not correct.\n"
 "Your save seems corrupted. It got deleted."
@@ -63,27 +86,32 @@ msgstr ""
 "Die JSON-Datei ist nicht korrekt.\n"
 "Ihre Speicherung scheint korrumpiert. Sie wurde gelöscht."
 
-#: squirrelbattle/interfaces.py:400
+#: squirrelbattle/interfaces.py:429
 #, python-brace-format
 msgid "{name} hits {opponent}."
 msgstr "{name} schlägt {opponent}."
 
-#: squirrelbattle/interfaces.py:412
+#: squirrelbattle/interfaces.py:441
 #, python-brace-format
 msgid "{name} takes {amount} damage."
 msgstr "{name} nimmt {amount} Schadenspunkte."
 
-#: squirrelbattle/interfaces.py:414
+#: squirrelbattle/interfaces.py:443
 #, python-brace-format
 msgid "{name} dies."
 msgstr "{name} stirbt."
 
-#: squirrelbattle/menus.py:72
+#: squirrelbattle/interfaces.py:477
+#, python-brace-format
+msgid "{entity} said: {message}"
+msgstr "{entity} hat gesagt: {message}"
+
+#: squirrelbattle/menus.py:73
 msgid "Back"
 msgstr "Zurück"
 
-#: squirrelbattle/tests/game_test.py:300 squirrelbattle/tests/game_test.py:303
-#: squirrelbattle/tests/game_test.py:306
+#: squirrelbattle/tests/game_test.py:344 squirrelbattle/tests/game_test.py:347
+#: squirrelbattle/tests/game_test.py:350 squirrelbattle/tests/game_test.py:353
 #: squirrelbattle/tests/translations_test.py:16
 msgid "New game"
 msgstr "Neu Spiel"
@@ -161,41 +189,65 @@ msgid "Key used to drop an item in the inventory"
 msgstr "Taste um eines Objekts im Bestand zu werfen"
 
 #: squirrelbattle/tests/translations_test.py:53
+msgid "Key used to talk to a friendly entity"
+msgstr "Taste um mit einer friedlicher Entität zu sprechen"
+
+#: squirrelbattle/tests/translations_test.py:55
+msgid "Key used to wait"
+msgstr "Wartentaste"
+
+#: squirrelbattle/tests/translations_test.py:56
 msgid "Texture pack"
 msgstr "Textur-Packung"
 
-#: squirrelbattle/tests/translations_test.py:54
+#: squirrelbattle/tests/translations_test.py:57
 msgid "Language"
 msgstr "Sprache"
 
-#: squirrelbattle/tests/translations_test.py:57
+#: squirrelbattle/tests/translations_test.py:60
 msgid "player"
 msgstr "Spieler"
 
-#: squirrelbattle/tests/translations_test.py:59
-msgid "tiger"
-msgstr "Tiger"
-
-#: squirrelbattle/tests/translations_test.py:60
+#: squirrelbattle/tests/translations_test.py:62
 msgid "hedgehog"
 msgstr "Igel"
 
-#: squirrelbattle/tests/translations_test.py:61
+#: squirrelbattle/tests/translations_test.py:63
+msgid "merchant"
+msgstr "Kaufmann"
+
+#: squirrelbattle/tests/translations_test.py:64
 msgid "rabbit"
 msgstr "Kanninchen"
 
-#: squirrelbattle/tests/translations_test.py:62
+#: squirrelbattle/tests/translations_test.py:65
+msgid "sunflower"
+msgstr "Sonnenblume"
+
+#: squirrelbattle/tests/translations_test.py:66
 msgid "teddy bear"
 msgstr "Teddybär"
 
-#: squirrelbattle/tests/translations_test.py:64
+#: squirrelbattle/tests/translations_test.py:67
+msgid "tiger"
+msgstr "Tiger"
+
+#: squirrelbattle/tests/translations_test.py:69
 msgid "body snatch potion"
 msgstr "Leichenfleddererzaubertrank"
 
-#: squirrelbattle/tests/translations_test.py:65
+#: squirrelbattle/tests/translations_test.py:70
 msgid "bomb"
 msgstr "Bombe"
 
-#: squirrelbattle/tests/translations_test.py:66
+#: squirrelbattle/tests/translations_test.py:71
+msgid "explosion"
+msgstr "Explosion"
+
+#: squirrelbattle/tests/translations_test.py:72
 msgid "heart"
 msgstr "Herz"
+
+#: squirrelbattle/tests/translations_test.py:73
+msgid "sword"
+msgstr "schwert"
diff --git a/squirrelbattle/locale/en/LC_MESSAGES/squirrelbattle.po b/squirrelbattle/locale/en/LC_MESSAGES/squirrelbattle.po
new file mode 100644
index 0000000..c45e893
--- /dev/null
+++ b/squirrelbattle/locale/en/LC_MESSAGES/squirrelbattle.po
@@ -0,0 +1,207 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR ÿnérant, eichhornchen, nicomarg, charlse
+# This file is distributed under the same license as the squirrelbattle package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: squirrelbattle 3.14.1\n"
+"Report-Msgid-Bugs-To: squirrel-battle@crans.org\n"
+"POT-Creation-Date: 2020-12-01 17:10+0100\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+
+#: squirrelbattle/display/statsdisplay.py:34
+msgid "Inventory:"
+msgstr ""
+
+#: squirrelbattle/display/statsdisplay.py:39
+msgid "YOU ARE DEAD"
+msgstr ""
+
+#: squirrelbattle/interfaces.py:394 squirrelbattle/interfaces.py:398
+#: squirrelbattle/interfaces.py:408
+#, python-brace-format
+msgid "{name} hits {opponent}."
+msgstr ""
+
+#: squirrelbattle/interfaces.py:405 squirrelbattle/interfaces.py:410
+#: squirrelbattle/interfaces.py:420
+#, python-brace-format
+msgid "{name} takes {amount} damage."
+msgstr ""
+
+#: squirrelbattle/menus.py:45 squirrelbattle/tests/translations_test.py:14
+#: squirrelbattle/tests/game_test.py:284 squirrelbattle/tests/game_test.py:287
+#: squirrelbattle/tests/translations_test.py:16
+#: squirrelbattle/tests/game_test.py:290
+msgid "New game"
+msgstr ""
+
+#: squirrelbattle/menus.py:46 squirrelbattle/tests/translations_test.py:15
+#: squirrelbattle/tests/translations_test.py:17
+msgid "Resume"
+msgstr ""
+
+#: squirrelbattle/menus.py:47 squirrelbattle/tests/translations_test.py:17
+#: squirrelbattle/tests/translations_test.py:19
+msgid "Save"
+msgstr ""
+
+#: squirrelbattle/menus.py:48 squirrelbattle/tests/translations_test.py:16
+#: squirrelbattle/tests/translations_test.py:18
+msgid "Load"
+msgstr ""
+
+#: squirrelbattle/menus.py:49 squirrelbattle/tests/translations_test.py:18
+#: squirrelbattle/tests/translations_test.py:20
+msgid "Settings"
+msgstr ""
+
+#: squirrelbattle/menus.py:50 squirrelbattle/tests/translations_test.py:19
+#: squirrelbattle/tests/translations_test.py:21
+msgid "Exit"
+msgstr ""
+
+#: squirrelbattle/menus.py:71
+msgid "Back"
+msgstr ""
+
+#: squirrelbattle/game.py:147 squirrelbattle/game.py:148
+msgid ""
+"Some keys are missing in your save file.\n"
+"Your save seems to be corrupt. It got deleted."
+msgstr ""
+
+#: squirrelbattle/game.py:155 squirrelbattle/game.py:156
+msgid ""
+"No player was found on this map!\n"
+"Maybe you died?"
+msgstr ""
+
+#: squirrelbattle/game.py:175 squirrelbattle/game.py:176
+msgid ""
+"The JSON file is not correct.\n"
+"Your save seems corrupted. It got deleted."
+msgstr ""
+
+#: squirrelbattle/settings.py:21 squirrelbattle/tests/translations_test.py:21
+#: squirrelbattle/tests/translations_test.py:25
+#: squirrelbattle/tests/translations_test.py:27
+msgid "Main key to move up"
+msgstr ""
+
+#: squirrelbattle/settings.py:22 squirrelbattle/tests/translations_test.py:23
+#: squirrelbattle/tests/translations_test.py:27
+#: squirrelbattle/tests/translations_test.py:29
+msgid "Secondary key to move up"
+msgstr ""
+
+#: squirrelbattle/settings.py:23 squirrelbattle/tests/translations_test.py:25
+#: squirrelbattle/tests/translations_test.py:29
+#: squirrelbattle/tests/translations_test.py:31
+msgid "Main key to move down"
+msgstr ""
+
+#: squirrelbattle/settings.py:24 squirrelbattle/tests/translations_test.py:27
+#: squirrelbattle/tests/translations_test.py:31
+#: squirrelbattle/tests/translations_test.py:33
+msgid "Secondary key to move down"
+msgstr ""
+
+#: squirrelbattle/settings.py:25 squirrelbattle/tests/translations_test.py:29
+#: squirrelbattle/tests/translations_test.py:33
+#: squirrelbattle/tests/translations_test.py:35
+msgid "Main key to move left"
+msgstr ""
+
+#: squirrelbattle/settings.py:26 squirrelbattle/tests/translations_test.py:31
+#: squirrelbattle/tests/translations_test.py:35
+#: squirrelbattle/tests/translations_test.py:37
+msgid "Secondary key to move left"
+msgstr ""
+
+#: squirrelbattle/settings.py:27 squirrelbattle/tests/translations_test.py:33
+#: squirrelbattle/tests/translations_test.py:37
+#: squirrelbattle/tests/translations_test.py:39
+msgid "Main key to move right"
+msgstr ""
+
+#: squirrelbattle/settings.py:29 squirrelbattle/tests/translations_test.py:35
+#: squirrelbattle/tests/translations_test.py:39
+#: squirrelbattle/tests/translations_test.py:41
+msgid "Secondary key to move right"
+msgstr ""
+
+#: squirrelbattle/settings.py:30 squirrelbattle/tests/translations_test.py:37
+#: squirrelbattle/tests/translations_test.py:41
+#: squirrelbattle/tests/translations_test.py:43
+msgid "Key to validate a menu"
+msgstr ""
+
+#: squirrelbattle/settings.py:31 squirrelbattle/tests/translations_test.py:39
+#: squirrelbattle/tests/translations_test.py:43
+#: squirrelbattle/tests/translations_test.py:45
+msgid "Texture pack"
+msgstr ""
+
+#: squirrelbattle/settings.py:32 squirrelbattle/tests/translations_test.py:40
+#: squirrelbattle/tests/translations_test.py:44
+#: squirrelbattle/tests/translations_test.py:46
+msgid "Language"
+msgstr ""
+
+#: squirrelbattle/interfaces.py:407 squirrelbattle/interfaces.py:412
+#: squirrelbattle/interfaces.py:422
+#, python-brace-format
+msgid "{name} dies."
+msgstr ""
+
+#: squirrelbattle/tests/translations_test.py:47
+#: squirrelbattle/tests/translations_test.py:49
+msgid "player"
+msgstr ""
+
+#: squirrelbattle/tests/translations_test.py:49
+#: squirrelbattle/tests/translations_test.py:51
+msgid "tiger"
+msgstr ""
+
+#: squirrelbattle/tests/translations_test.py:50
+#: squirrelbattle/tests/translations_test.py:52
+msgid "hedgehog"
+msgstr ""
+
+#: squirrelbattle/tests/translations_test.py:51
+#: squirrelbattle/tests/translations_test.py:53
+msgid "rabbit"
+msgstr ""
+
+#: squirrelbattle/tests/translations_test.py:52
+#: squirrelbattle/tests/translations_test.py:54
+msgid "teddy bear"
+msgstr ""
+
+#: squirrelbattle/tests/translations_test.py:54
+#: squirrelbattle/tests/translations_test.py:56
+msgid "bomb"
+msgstr ""
+
+#: squirrelbattle/tests/translations_test.py:55
+#: squirrelbattle/tests/translations_test.py:57
+msgid "heart"
+msgstr ""
+
+#: squirrelbattle/entities/friendly.py:31
+msgid "Flower power!!"
+msgstr ""
+
+#: squirrelbattle/entities/friendly.py:31
+msgid "The sun is warm today"
+msgstr ""
diff --git a/squirrelbattle/locale/es/LC_MESSAGES/squirrelbattle.po b/squirrelbattle/locale/es/LC_MESSAGES/squirrelbattle.po
index acbfb5a..f4d1c3c 100644
--- a/squirrelbattle/locale/es/LC_MESSAGES/squirrelbattle.po
+++ b/squirrelbattle/locale/es/LC_MESSAGES/squirrelbattle.po
@@ -1,49 +1,67 @@
-# Spanish translation of Squirrel Battle
-# Copyright (C) YEAR ÿnérant, eichhornchen, nicomarg, charlse
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR ÿnérant, eichhornchen, nicomarg, charlse, ifugao
 # This file is distributed under the same license as the squirrelbattle package.
-# Translation by ifugaao
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
 #
+#, fuzzy
 msgid ""
 msgstr ""
 "Project-Id-Version: squirrelbattle 3.14.1\n"
 "Report-Msgid-Bugs-To: squirrel-battle@crans.org\n"
-"POT-Creation-Date: 2020-12-05 14:46+0100\n"
+"POT-Creation-Date: 2020-12-12 18:02+0100\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
-"Last-Translator: ifugao\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
 "Language: \n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
 
-# Suggested in Weblate: == INVENTORIO ==
-#: squirrelbattle/display/menudisplay.py:105
-msgid "== INVENTORY =="
-msgstr "== INVENTORIO =="
+#: squirrelbattle/display/menudisplay.py:139
+msgid "INVENTORY"
+msgstr "INVENTORIO"
 
-# Suggested in Weblate: Inventorio :
-#: squirrelbattle/display/statsdisplay.py:34
+#: squirrelbattle/display/menudisplay.py:164
+msgid "STALL"
+msgstr "PUESTO"
+
+#: squirrelbattle/display/statsdisplay.py:33
 msgid "Inventory:"
 msgstr "Inventorio :"
 
-# Suggested in Weblate: ERES MUERTO
-#: squirrelbattle/display/statsdisplay.py:50
+#: squirrelbattle/display/statsdisplay.py:52
 msgid "YOU ARE DEAD"
 msgstr "ERES MUERTO"
 
+#: squirrelbattle/entities/friendly.py:33
+msgid "I don't sell any squirrel"
+msgstr "No vendo ninguna ardilla"
+
+#: squirrelbattle/entities/friendly.py:52
+msgid "Flower power!!"
+msgstr "Poder de las flores!!"
+
+#: squirrelbattle/entities/friendly.py:52
+msgid "The sun is warm today"
+msgstr "El sol está caliente hoy"
+
 #. The bomb is exploding.
 #. Each entity that is close to the bomb takes damages.
 #. The player earn XP if the entity was killed.
-#: squirrelbattle/entities/items.py:128
+#: squirrelbattle/entities/items.py:151
 msgid "Bomb is exploding."
 msgstr "La bomba está explotando."
 
-#: squirrelbattle/entities/items.py:172
+#: squirrelbattle/entities/items.py:248
 #, python-brace-format
 msgid "{player} exchanged its body with {entity}."
 msgstr "{player} intercambió su cuerpo con {entity}."
 
-#: squirrelbattle/game.py:177
+#: squirrelbattle/game.py:205 squirrelbattle/tests/game_test.py:573
+msgid "You do not have enough money"
+msgstr "No tienes suficiente dinero"
+
+#: squirrelbattle/game.py:249
 msgid ""
 "Some keys are missing in your save file.\n"
 "Your save seems to be corrupt. It got deleted."
@@ -51,7 +69,7 @@ msgstr ""
 "Algunas claves faltan en su archivo de guarda.\n"
 "Su guarda parece a ser corruptido. Fue eliminado."
 
-#: squirrelbattle/game.py:185
+#: squirrelbattle/game.py:257
 msgid ""
 "No player was found on this map!\n"
 "Maybe you died?"
@@ -59,7 +77,7 @@ msgstr ""
 "No jugador encontrado sobre la carta !\n"
 "¿ Quizas murió ?"
 
-#: squirrelbattle/game.py:205
+#: squirrelbattle/game.py:277
 msgid ""
 "The JSON file is not correct.\n"
 "Your save seems corrupted. It got deleted."
@@ -67,28 +85,32 @@ msgstr ""
 "El JSON archivo no es correcto.\n"
 "Su guarda parece corrupta. Fue eliminada."
 
-#: squirrelbattle/interfaces.py:400
+#: squirrelbattle/interfaces.py:429
 #, python-brace-format
 msgid "{name} hits {opponent}."
 msgstr "{name} golpea a {opponent}."
 
-#: squirrelbattle/interfaces.py:412
+#: squirrelbattle/interfaces.py:441
 #, python-brace-format
 msgid "{name} takes {amount} damage."
 msgstr "{name} recibe {amount} daño."
 
-#: squirrelbattle/interfaces.py:414
+#: squirrelbattle/interfaces.py:443
 #, python-brace-format
 msgid "{name} dies."
 msgstr "{name} se muere."
 
-#: squirrelbattle/menus.py:72
+#: squirrelbattle/interfaces.py:477
+#, python-brace-format
+msgid "{entity} said: {message}"
+msgstr "{entity} dijo : {message}"
+
+#: squirrelbattle/menus.py:73
 msgid "Back"
 msgstr "Volver"
 
-#: squirrelbattle/tests/game_test.py:300,
-#: squirrelbattle/tests/game_test.py:303,
-#: squirrelbattle/tests/game_test.py:306,
+#: squirrelbattle/tests/game_test.py:344 squirrelbattle/tests/game_test.py:347
+#: squirrelbattle/tests/game_test.py:350 squirrelbattle/tests/game_test.py:353
 #: squirrelbattle/tests/translations_test.py:16
 msgid "New game"
 msgstr "Nuevo partido"
@@ -166,41 +188,65 @@ msgid "Key used to drop an item in the inventory"
 msgstr "Tecla para dejar un objeto del inventorio"
 
 #: squirrelbattle/tests/translations_test.py:53
+msgid "Key used to talk to a friendly entity"
+msgstr "Tecla para hablar con una entidad amiga"
+
+#: squirrelbattle/tests/translations_test.py:55
+msgid "Key used to wait"
+msgstr "Tecla para espera"
+
+#: squirrelbattle/tests/translations_test.py:56
 msgid "Texture pack"
 msgstr "Paquete de texturas"
 
-#: squirrelbattle/tests/translations_test.py:54
+#: squirrelbattle/tests/translations_test.py:57
 msgid "Language"
 msgstr "Languaje"
 
-#: squirrelbattle/tests/translations_test.py:57
+#: squirrelbattle/tests/translations_test.py:60
 msgid "player"
 msgstr "jugador"
 
-#: squirrelbattle/tests/translations_test.py:59
-msgid "tiger"
-msgstr "tigre"
-
-#: squirrelbattle/tests/translations_test.py:60
+#: squirrelbattle/tests/translations_test.py:62
 msgid "hedgehog"
 msgstr "erizo"
 
-#: squirrelbattle/tests/translations_test.py:61
+#: squirrelbattle/tests/translations_test.py:63
+msgid "merchant"
+msgstr "comerciante"
+
+#: squirrelbattle/tests/translations_test.py:64
 msgid "rabbit"
 msgstr "conejo"
 
-#: squirrelbattle/tests/translations_test.py:62
+#: squirrelbattle/tests/translations_test.py:65
+msgid "sunflower"
+msgstr "girasol"
+
+#: squirrelbattle/tests/translations_test.py:66
 msgid "teddy bear"
 msgstr "osito de peluche"
 
-#: squirrelbattle/tests/translations_test.py:64
+#: squirrelbattle/tests/translations_test.py:67
+msgid "tiger"
+msgstr "tigre"
+
+#: squirrelbattle/tests/translations_test.py:69
 msgid "body snatch potion"
 msgstr "poción de intercambio"
 
-#: squirrelbattle/tests/translations_test.py:65
+#: squirrelbattle/tests/translations_test.py:70
 msgid "bomb"
 msgstr "bomba"
 
-#: squirrelbattle/tests/translations_test.py:66
+#: squirrelbattle/tests/translations_test.py:71
+msgid "explosion"
+msgstr "explosión"
+
+#: squirrelbattle/tests/translations_test.py:72
 msgid "heart"
 msgstr "corazón"
+
+#: squirrelbattle/tests/translations_test.py:73
+msgid "sword"
+msgstr "espada"
diff --git a/squirrelbattle/locale/fr/LC_MESSAGES/squirrelbattle.po b/squirrelbattle/locale/fr/LC_MESSAGES/squirrelbattle.po
index 85bd728..8b1c4db 100644
--- a/squirrelbattle/locale/fr/LC_MESSAGES/squirrelbattle.po
+++ b/squirrelbattle/locale/fr/LC_MESSAGES/squirrelbattle.po
@@ -1,46 +1,68 @@
-# French translation of Squirrel Battle
-# Copyright (C) YEAR ÿnérant, eichhornchen, nicomarg, charlse
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR ÿnérant, eichhornchen, nicomarg, charlse, ifugao
 # This file is distributed under the same license as the squirrelbattle package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
 #
 #, fuzzy
 msgid ""
 msgstr ""
 "Project-Id-Version: squirrelbattle 3.14.1\n"
 "Report-Msgid-Bugs-To: squirrel-battle@crans.org\n"
-"POT-Creation-Date: 2020-12-05 14:46+0100\n"
+"POT-Creation-Date: 2020-12-12 18:02+0100\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
-"Language: fr\n"
+"Language: \n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
 
-#: squirrelbattle/display/menudisplay.py:105
-msgid "== INVENTORY =="
-msgstr "== INVENTAIRE =="
+#: squirrelbattle/display/menudisplay.py:139
+msgid "INVENTORY"
+msgstr "INVENTAIRE"
 
-#: squirrelbattle/display/statsdisplay.py:34
+#: squirrelbattle/display/menudisplay.py:164
+msgid "STALL"
+msgstr "STAND"
+
+#: squirrelbattle/display/statsdisplay.py:33
 msgid "Inventory:"
 msgstr "Inventaire :"
 
-#: squirrelbattle/display/statsdisplay.py:50
+#: squirrelbattle/display/statsdisplay.py:52
 msgid "YOU ARE DEAD"
 msgstr "VOUS ÊTES MORT"
 
+#. TODO
+#: squirrelbattle/entities/friendly.py:33
+msgid "I don't sell any squirrel"
+msgstr "Je ne vends pas d'écureuil"
+
+#: squirrelbattle/entities/friendly.py:52
+msgid "Flower power!!"
+msgstr "Pouvoir des fleurs !!"
+
+#: squirrelbattle/entities/friendly.py:52
+msgid "The sun is warm today"
+msgstr "Le soleil est chaud aujourd'hui"
+
 #. The bomb is exploding.
 #. Each entity that is close to the bomb takes damages.
 #. The player earn XP if the entity was killed.
-#: squirrelbattle/entities/items.py:128
+#: squirrelbattle/entities/items.py:151
 msgid "Bomb is exploding."
 msgstr "La bombe explose."
 
-#: squirrelbattle/entities/items.py:172
+#: squirrelbattle/entities/items.py:248
 #, python-brace-format
 msgid "{player} exchanged its body with {entity}."
 msgstr "{player} a échangé son corps avec {entity}."
 
-#: squirrelbattle/game.py:177
+#: squirrelbattle/game.py:205 squirrelbattle/tests/game_test.py:573
+msgid "You do not have enough money"
+msgstr "Vous n'avez pas assez d'argent"
+
+#: squirrelbattle/game.py:249
 msgid ""
 "Some keys are missing in your save file.\n"
 "Your save seems to be corrupt. It got deleted."
@@ -48,7 +70,7 @@ msgstr ""
 "Certaines clés de votre ficher de sauvegarde sont manquantes.\n"
 "Votre sauvegarde semble corrompue. Elle a été supprimée."
 
-#: squirrelbattle/game.py:185
+#: squirrelbattle/game.py:257
 msgid ""
 "No player was found on this map!\n"
 "Maybe you died?"
@@ -56,7 +78,7 @@ msgstr ""
 "Aucun joueur n'a été trouvé sur la carte !\n"
 "Peut-être êtes-vous mort ?"
 
-#: squirrelbattle/game.py:205
+#: squirrelbattle/game.py:277
 msgid ""
 "The JSON file is not correct.\n"
 "Your save seems corrupted. It got deleted."
@@ -64,27 +86,32 @@ msgstr ""
 "Le fichier JSON de sauvegarde est incorrect.\n"
 "Votre sauvegarde semble corrompue. Elle a été supprimée."
 
-#: squirrelbattle/interfaces.py:400
+#: squirrelbattle/interfaces.py:429
 #, python-brace-format
 msgid "{name} hits {opponent}."
 msgstr "{name} frappe {opponent}."
 
-#: squirrelbattle/interfaces.py:412
+#: squirrelbattle/interfaces.py:441
 #, python-brace-format
 msgid "{name} takes {amount} damage."
 msgstr "{name} prend {amount} points de dégât."
 
-#: squirrelbattle/interfaces.py:414
+#: squirrelbattle/interfaces.py:443
 #, python-brace-format
 msgid "{name} dies."
 msgstr "{name} meurt."
 
-#: squirrelbattle/menus.py:72
+#: squirrelbattle/interfaces.py:477
+#, python-brace-format
+msgid "{entity} said: {message}"
+msgstr "{entity} a dit : {message}"
+
+#: squirrelbattle/menus.py:73
 msgid "Back"
 msgstr "Retour"
 
-#: squirrelbattle/tests/game_test.py:300 squirrelbattle/tests/game_test.py:303
-#: squirrelbattle/tests/game_test.py:306
+#: squirrelbattle/tests/game_test.py:344 squirrelbattle/tests/game_test.py:347
+#: squirrelbattle/tests/game_test.py:350 squirrelbattle/tests/game_test.py:353
 #: squirrelbattle/tests/translations_test.py:16
 msgid "New game"
 msgstr "Nouvelle partie"
@@ -162,41 +189,65 @@ msgid "Key used to drop an item in the inventory"
 msgstr "Touche pour jeter un objet de l'inventaire"
 
 #: squirrelbattle/tests/translations_test.py:53
+msgid "Key used to talk to a friendly entity"
+msgstr "Touche pour parler à une entité pacifique"
+
+#: squirrelbattle/tests/translations_test.py:55
+msgid "Key used to wait"
+msgstr "Touche pour attendre"
+
+#: squirrelbattle/tests/translations_test.py:56
 msgid "Texture pack"
 msgstr "Pack de textures"
 
-#: squirrelbattle/tests/translations_test.py:54
+#: squirrelbattle/tests/translations_test.py:57
 msgid "Language"
 msgstr "Langue"
 
-#: squirrelbattle/tests/translations_test.py:57
+#: squirrelbattle/tests/translations_test.py:60
 msgid "player"
 msgstr "joueur"
 
-#: squirrelbattle/tests/translations_test.py:59
-msgid "tiger"
-msgstr "tigre"
-
-#: squirrelbattle/tests/translations_test.py:60
+#: squirrelbattle/tests/translations_test.py:62
 msgid "hedgehog"
 msgstr "hérisson"
 
-#: squirrelbattle/tests/translations_test.py:61
+#: squirrelbattle/tests/translations_test.py:63
+msgid "merchant"
+msgstr "marchand"
+
+#: squirrelbattle/tests/translations_test.py:64
 msgid "rabbit"
 msgstr "lapin"
 
-#: squirrelbattle/tests/translations_test.py:62
+#: squirrelbattle/tests/translations_test.py:65
+msgid "sunflower"
+msgstr "tournesol"
+
+#: squirrelbattle/tests/translations_test.py:66
 msgid "teddy bear"
 msgstr "nounours"
 
-#: squirrelbattle/tests/translations_test.py:64
+#: squirrelbattle/tests/translations_test.py:67
+msgid "tiger"
+msgstr "tigre"
+
+#: squirrelbattle/tests/translations_test.py:69
 msgid "body snatch potion"
 msgstr "potion d'arrachage de corps"
 
-#: squirrelbattle/tests/translations_test.py:65
+#: squirrelbattle/tests/translations_test.py:70
 msgid "bomb"
 msgstr "bombe"
 
-#: squirrelbattle/tests/translations_test.py:66
+#: squirrelbattle/tests/translations_test.py:71
+msgid "explosion"
+msgstr ""
+
+#: squirrelbattle/tests/translations_test.py:72
 msgid "heart"
 msgstr "cœur"
+
+#: squirrelbattle/tests/translations_test.py:73
+msgid "sword"
+msgstr "épée"
diff --git a/squirrelbattle/menus.py b/squirrelbattle/menus.py
index 3a536f3..e0087a3 100644
--- a/squirrelbattle/menus.py
+++ b/squirrelbattle/menus.py
@@ -6,6 +6,7 @@ from typing import Any, Optional
 
 from .display.texturepack import TexturePack
 from .entities.player import Player
+from .entities.friendly import Merchant
 from .enums import GameMode, KeyValues, DisplayActions
 from .settings import Settings
 from .translations import gettext as _, Translator
@@ -128,3 +129,14 @@ class InventoryMenu(Menu):
     @property
     def values(self) -> list:
         return self.player.inventory
+
+
+class StoreMenu(Menu):
+    merchant: Merchant
+
+    def update_merchant(self, merchant: Merchant) -> None:
+        self.merchant = merchant
+
+    @property
+    def values(self) -> list:
+        return self.merchant.inventory
diff --git a/squirrelbattle/settings.py b/squirrelbattle/settings.py
index 4004645..91edfa4 100644
--- a/squirrelbattle/settings.py
+++ b/squirrelbattle/settings.py
@@ -31,6 +31,8 @@ class Settings:
         self.KEY_USE = ['u', 'Key used to use an item in the inventory']
         self.KEY_EQUIP = ['e', 'Key used to equip an item in the inventory']
         self.KEY_DROP = ['r', 'Key used to drop an item in the inventory']
+        self.KEY_CHAT = ['t', 'Key used to talk to a friendly entity']
+        self.KEY_WAIT = ['w', 'Key used to wait']
         self.TEXTURE_PACK = ['ascii', 'Texture pack']
         self.LOCALE = [locale.getlocale()[0][:2], 'Language']
 
diff --git a/squirrelbattle/term_manager.py b/squirrelbattle/term_manager.py
index 6284173..5a98a4a 100644
--- a/squirrelbattle/term_manager.py
+++ b/squirrelbattle/term_manager.py
@@ -20,6 +20,8 @@ class TermManager:  # pragma: no cover
         curses.cbreak()
         # make cursor invisible
         curses.curs_set(False)
+        # Catch mouse events
+        curses.mousemask(True)
         # Enable colors
         curses.start_color()
 
diff --git a/squirrelbattle/tests/entities_test.py b/squirrelbattle/tests/entities_test.py
index 2c72abd..70e3748 100644
--- a/squirrelbattle/tests/entities_test.py
+++ b/squirrelbattle/tests/entities_test.py
@@ -3,7 +3,8 @@
 
 import unittest
 
-from squirrelbattle.entities.items import BodySnatchPotion, Bomb, Heart, Item
+from squirrelbattle.entities.items import BodySnatchPotion, Bomb, Heart, Item, \
+    Explosion
 from squirrelbattle.entities.monsters import Tiger, Hedgehog, Rabbit, TeddyBear
 from squirrelbattle.entities.player import Player
 from squirrelbattle.interfaces import Entity, Map
@@ -138,6 +139,20 @@ class TestEntities(unittest.TestCase):
         self.assertTrue(teddy_bear.dead)
         bomb_state = item.save_state()
         self.assertEqual(bomb_state["damage"], item.damage)
+        explosions = self.map.find_entities(Explosion)
+        self.assertTrue(explosions)
+        explosion = explosions[0]
+        self.assertEqual(explosion.y, item.y)
+        self.assertEqual(explosion.x, item.x)
+
+        # The player can't hold the explosion
+        explosion.hold(self.player)
+        self.assertNotIn(explosion, self.player.inventory)
+        self.assertFalse(explosion.held)
+
+        # The explosion disappears after one tick
+        explosion.act(self.map)
+        self.assertNotIn(explosion, self.map.entities)
 
     def test_hearts(self) -> None:
         """
diff --git a/squirrelbattle/tests/game_test.py b/squirrelbattle/tests/game_test.py
index 3a32c95..52aeeaf 100644
--- a/squirrelbattle/tests/game_test.py
+++ b/squirrelbattle/tests/game_test.py
@@ -7,7 +7,8 @@ import unittest
 from ..bootstrap import Bootstrap
 from ..display.display import Display
 from ..display.display_manager import DisplayManager
-from ..entities.items import Bomb
+from ..entities.friendly import Merchant, Sunflower
+from ..entities.items import Bomb, Heart, Sword, Explosion
 from ..entities.player import Player
 from ..enums import DisplayActions
 from ..game import Game, KeyValues, GameMode
@@ -34,7 +35,17 @@ class TestGame(unittest.TestCase):
         """
         bomb = Bomb()
         self.game.map.add_entity(bomb)
+        sword = Sword()
+        self.game.map.add_entity(sword)
+        # Add items in the inventory to check that it is well loaded
         bomb.hold(self.game.player)
+        sword.hold(self.game.player)
+
+        # Ensure that merchants can be saved
+        merchant = Merchant()
+        merchant.move(3, 6)
+        self.game.map.add_entity(merchant)
+
         old_state = self.game.save_state()
 
         self.game.handle_key_pressed(KeyValues.DOWN)
@@ -117,6 +128,9 @@ class TestGame(unittest.TestCase):
         self.assertEqual(KeyValues.translate_key(
             self.game.settings.KEY_INVENTORY, self.game.settings),
             KeyValues.INVENTORY)
+        self.assertEqual(KeyValues.translate_key(
+            self.game.settings.KEY_CHAT, self.game.settings),
+            KeyValues.CHAT)
         self.assertEqual(KeyValues.translate_key(
             self.game.settings.KEY_USE, self.game.settings),
             KeyValues.USE)
@@ -126,6 +140,9 @@ class TestGame(unittest.TestCase):
         self.assertEqual(KeyValues.translate_key(
             self.game.settings.KEY_DROP, self.game.settings),
             KeyValues.DROP)
+        self.assertEqual(KeyValues.translate_key(
+            self.game.settings.KEY_WAIT, self.game.settings),
+            KeyValues.WAIT)
         self.assertEqual(KeyValues.translate_key(' ', self.game.settings),
                          KeyValues.SPACE)
         self.assertEqual(KeyValues.translate_key('plop', self.game.settings),
@@ -213,9 +230,45 @@ class TestGame(unittest.TestCase):
         self.assertEqual(new_y, y)
         self.assertEqual(new_x, x - 1)
 
+        explosion = Explosion()
+        self.game.map.add_entity(explosion)
+        self.assertIn(explosion, self.game.map.entities)
+        self.game.handle_key_pressed(KeyValues.WAIT)
+        self.assertNotIn(explosion, self.game.map.entities)
+
         self.game.handle_key_pressed(KeyValues.SPACE)
         self.assertEqual(self.game.state, GameMode.MAINMENU)
 
+    def test_mouse_click(self) -> None:
+        """
+        Simulate mouse clicks.
+        """
+        self.game.state = GameMode.MAINMENU
+
+        # Change the color of the artwork
+        self.game.display_actions(DisplayActions.MOUSE, 0, 10)
+
+        # Settings menu
+        self.game.display_actions(DisplayActions.MOUSE, 25, 21)
+        self.assertEqual(self.game.main_menu.position, 4)
+        self.assertEqual(self.game.state, GameMode.SETTINGS)
+
+        bomb = Bomb()
+        bomb.hold(self.game.player)
+        bomb2 = Bomb()
+        bomb2.hold(self.game.player)
+
+        self.game.state = GameMode.INVENTORY
+
+        # Click nowhere
+        self.game.display_actions(DisplayActions.MOUSE, 0, 0)
+        self.assertEqual(self.game.state, GameMode.INVENTORY)
+
+        # Click on the second item
+        self.game.display_actions(DisplayActions.MOUSE, 8, 25)
+        self.assertEqual(self.game.state, GameMode.INVENTORY)
+        self.assertEqual(self.game.inventory_menu.position, 1)
+
     def test_new_game(self) -> None:
         """
         Ensure that the start button starts a new game.
@@ -253,13 +306,13 @@ class TestGame(unittest.TestCase):
         self.game.handle_key_pressed(KeyValues.ENTER)
         self.assertEqual(self.game.state, GameMode.SETTINGS)
 
-        # Define the "move up" key to 'w'
+        # Define the "move up" key to 'h'
         self.assertFalse(self.game.settings_menu.waiting_for_key)
         self.game.handle_key_pressed(KeyValues.ENTER)
         self.assertTrue(self.game.settings_menu.waiting_for_key)
-        self.game.handle_key_pressed(None, 'w')
+        self.game.handle_key_pressed(None, 'h')
         self.assertFalse(self.game.settings_menu.waiting_for_key)
-        self.assertEqual(self.game.settings.KEY_UP_PRIMARY, 'w')
+        self.assertEqual(self.game.settings.KEY_UP_PRIMARY, 'h')
 
         # Navigate to "move left"
         self.game.handle_key_pressed(KeyValues.DOWN)
@@ -280,7 +333,7 @@ class TestGame(unittest.TestCase):
         self.assertEqual(self.game.settings.KEY_LEFT_PRIMARY, 'a')
 
         # Navigate to "texture pack"
-        for ignored in range(9):
+        for ignored in range(11):
             self.game.handle_key_pressed(KeyValues.DOWN)
 
         # Change texture pack
@@ -417,3 +470,118 @@ class TestGame(unittest.TestCase):
         self.assertTrue(bomb.exploding)
         self.assertEqual(bomb.y, self.game.player.y)
         self.assertEqual(bomb.x, self.game.player.x)
+
+    def test_talk_to_sunflowers(self) -> None:
+        """
+        Interact with sunflowers
+        """
+        self.game.state = GameMode.PLAY
+
+        sunflower = Sunflower()
+        sunflower.move(2, 6)
+        self.game.map.add_entity(sunflower)
+
+        # Does nothing
+        self.assertIsNone(self.game.handle_friendly_entity_chat(KeyValues.UP))
+
+        # Talk to sunflower... or not
+        self.game.handle_key_pressed(KeyValues.CHAT)
+        self.assertTrue(self.game.waiting_for_friendly_key)
+        # Wrong key
+        self.game.handle_key_pressed(KeyValues.EQUIP)
+        self.assertFalse(self.game.waiting_for_friendly_key)
+        self.game.handle_key_pressed(KeyValues.CHAT)
+        self.assertTrue(self.game.waiting_for_friendly_key)
+        self.game.handle_key_pressed(KeyValues.UP)
+        self.assertFalse(self.game.waiting_for_friendly_key)
+        self.assertEqual(self.game.state, GameMode.PLAY)
+        self.assertFalse(len(self.game.logs.messages) > 1)
+
+        # Talk to sunflower
+        self.game.handle_key_pressed(KeyValues.CHAT)
+        self.assertTrue(self.game.waiting_for_friendly_key)
+        self.game.handle_key_pressed(KeyValues.DOWN)
+        self.assertFalse(self.game.waiting_for_friendly_key)
+        self.assertEqual(self.game.state, GameMode.PLAY)
+        self.assertTrue(self.game.logs.messages)
+        # Ensure that the message is a good message
+        self.assertTrue(any(self.game.logs.messages[1].endswith(msg)
+                            for msg in Sunflower().dialogue_option))
+
+        # Test all directions to detect the friendly entity
+        self.game.player.move(3, 6)
+        self.game.handle_key_pressed(KeyValues.CHAT)
+        self.game.handle_key_pressed(KeyValues.UP)
+        self.assertEqual(len(self.game.logs.messages), 3)
+        self.game.player.move(2, 7)
+        self.game.handle_key_pressed(KeyValues.CHAT)
+        self.game.handle_key_pressed(KeyValues.LEFT)
+        self.assertEqual(len(self.game.logs.messages), 4)
+        self.game.player.move(2, 5)
+        self.game.handle_key_pressed(KeyValues.CHAT)
+        self.game.handle_key_pressed(KeyValues.RIGHT)
+        self.assertEqual(len(self.game.logs.messages), 5)
+
+    def test_talk_to_merchant(self) -> None:
+        """
+        Interact with merchants
+        """
+        self.game.state = GameMode.PLAY
+
+        merchant = Merchant()
+        merchant.move(2, 6)
+        self.game.map.add_entity(merchant)
+
+        # Does nothing
+        self.assertIsNone(self.game.handle_friendly_entity_chat(KeyValues.UP))
+
+        # Talk to merchant
+        self.game.handle_key_pressed(KeyValues.CHAT)
+        self.assertTrue(self.game.waiting_for_friendly_key)
+        self.game.handle_key_pressed(KeyValues.DOWN)
+        self.assertFalse(self.game.waiting_for_friendly_key)
+        self.assertEqual(self.game.state, GameMode.STORE)
+        self.assertTrue(self.game.logs.messages)
+
+        # Navigate in the menu
+        self.game.handle_key_pressed(KeyValues.DOWN)
+        self.game.handle_key_pressed(KeyValues.DOWN)
+        self.game.handle_key_pressed(KeyValues.UP)
+        self.assertEqual(self.game.store_menu.position, 1)
+
+        self.game.player.hazel = 0x7ffff42ff
+
+        # The second item is not a heart
+        merchant.inventory[1] = Sword()
+        # Buy the second item by clicking on it
+        item = self.game.store_menu.validate()
+        self.assertIn(item, merchant.inventory)
+        self.game.display_actions(DisplayActions.MOUSE, 7, 25)
+        self.game.handle_key_pressed(KeyValues.ENTER)
+        self.assertIn(item, self.game.player.inventory)
+        self.assertNotIn(item, merchant.inventory)
+
+        # Buy a heart
+        merchant.inventory[1] = Heart()
+        item = self.game.store_menu.validate()
+        self.assertIn(item, merchant.inventory)
+        self.assertEqual(item, merchant.inventory[1])
+        self.game.player.health = self.game.player.maxhealth - 1 - item.healing
+        self.game.handle_key_pressed(KeyValues.ENTER)
+        self.assertNotIn(item, self.game.player.inventory)
+        self.assertNotIn(item, merchant.inventory)
+        self.assertEqual(self.game.player.health,
+                         self.game.player.maxhealth - 1)
+
+        # We don't have enough of money
+        self.game.player.hazel = 0
+        item = self.game.store_menu.validate()
+        self.game.handle_key_pressed(KeyValues.ENTER)
+        self.assertNotIn(item, self.game.player.inventory)
+        self.assertIn(item, merchant.inventory)
+        self.assertEqual(self.game.message, _("You do not have enough money"))
+        self.game.handle_key_pressed(KeyValues.ENTER)
+
+        # Exit the menu
+        self.game.handle_key_pressed(KeyValues.SPACE)
+        self.assertEqual(self.game.state, GameMode.PLAY)
diff --git a/squirrelbattle/tests/translations_test.py b/squirrelbattle/tests/translations_test.py
index 0cb39c5..0bd8873 100644
--- a/squirrelbattle/tests/translations_test.py
+++ b/squirrelbattle/tests/translations_test.py
@@ -50,17 +50,24 @@ class TestTranslations(unittest.TestCase):
                          "Touche pour équiper un objet de l'inventaire")
         self.assertEqual(_("Key used to drop an item in the inventory"),
                          "Touche pour jeter un objet de l'inventaire")
+        self.assertEqual(_("Key used to talk to a friendly entity"),
+                         "Touche pour parler à une entité pacifique")
+        self.assertEqual(_("Key used to wait"), "Touche pour attendre")
         self.assertEqual(_("Texture pack"), "Pack de textures")
         self.assertEqual(_("Language"), "Langue")
 
     def test_entities_translation(self) -> None:
         self.assertEqual(_("player"), "joueur")
 
-        self.assertEqual(_("tiger"), "tigre")
         self.assertEqual(_("hedgehog"), "hérisson")
+        self.assertEqual(_("merchant"), "marchand")
         self.assertEqual(_("rabbit"), "lapin")
+        self.assertEqual(_("sunflower"), "tournesol")
         self.assertEqual(_("teddy bear"), "nounours")
+        self.assertEqual(_("tiger"), "tigre")
 
         self.assertEqual(_("body snatch potion"), "potion d'arrachage de corps")
         self.assertEqual(_("bomb"), "bombe")
+        self.assertEqual(_("explosion"), "explosion")
         self.assertEqual(_("heart"), "cœur")
+        self.assertEqual(_("sword"), "épée")