diff --git a/squirrelbattle/assets/example_map.txt b/squirrelbattle/assets/example_map.txt
index e52172c..be2e798 100644
--- a/squirrelbattle/assets/example_map.txt
+++ b/squirrelbattle/assets/example_map.txt
@@ -1,8 +1,8 @@
 1 6
     #######                    #############        
-    #.H...#                    #...........#
+    #.H...#                    #...........#        
     #.....#                #####...........#        
-    #.....#                #............H..#
+    #.....#                #............H..#        
     #.#####                #.###...........#        
     #.#                    #.# #...........#        
     #.#                    #.# #############        
diff --git a/squirrelbattle/assets/example_map_2.txt b/squirrelbattle/assets/example_map_2.txt
index c959659..b9c751f 100644
--- a/squirrelbattle/assets/example_map_2.txt
+++ b/squirrelbattle/assets/example_map_2.txt
@@ -1,6 +1,6 @@
 1 17
             ###########                        #########                        
-            #....H....#                        #.......#
+            #....H....#                        #.......#                        
             #.........#             ############.......#                        
             #.........###############..........#.......##############           
             #.........#........................#....................#           
@@ -13,7 +13,7 @@
       ########.##########......#     #.........#              #.........#       
            #...........##......#     #.........#              #.........#       
            #...........##......#     #.........#              #.........#       
-           #...........##..H...#     #.........#  ################.######
+           #...........##..H...#     #.........#  ################.######       
            #...........##......#     #.........#  #.................############
            #...........##......#  ########.########.......#.........#..........#
            #...........##......#  #...............#.......#.........#..........#
diff --git a/squirrelbattle/game.py b/squirrelbattle/game.py
index 7ef8fc9..7807882 100644
--- a/squirrelbattle/game.py
+++ b/squirrelbattle/game.py
@@ -55,7 +55,7 @@ class Game:
         # TODO generate a new map procedurally
         self.maps = []
         self.map_index = 0
-        self.map = Map.load(ResourceManager.get_asset_path("example_map_2.txt"))
+        self.map = Map.load(ResourceManager.get_asset_path("example_map.txt"))
         self.map.logs = self.logs
         self.logs.clear()
         self.player = Player()
@@ -102,6 +102,24 @@ class Game:
                 self.handle_key_pressed(
                     KeyValues.translate_key(key, self.settings), key)
 
+            # FIXME This code should not be there, but rather in Map.tick
+            y, x = self.player.y, self.player.x
+            if self.map.tiles[y][x].is_ladder():
+                # We move up on the ladder of the beginning,
+                # down at the end of the stage
+                move_down = y != self.map.start_y and x != self.map.start_x
+                old_map = self.map
+                self.map_index += 1 if move_down else -1
+                self.map_index = max(0, self.map_index)
+                while self.map_index >= len(self.maps):
+                    self.maps.append(Map.load(ResourceManager.get_asset_path(
+                        "example_map_2.txt")))
+                new_map = self.map
+                old_map.remove_entity(self.player)
+                new_map.add_entity(self.player)
+                self.player.move(self.map.start_y, self.map.start_x)
+                self.display_actions(DisplayActions.UPDATE)
+
     def handle_key_pressed(self, key: Optional[KeyValues], raw_key: str = '')\
             -> None:
         """
diff --git a/squirrelbattle/interfaces.py b/squirrelbattle/interfaces.py
index 3394af8..788edaa 100644
--- a/squirrelbattle/interfaces.py
+++ b/squirrelbattle/interfaces.py
@@ -140,12 +140,15 @@ class Map:
         Put randomly {count} entities on the map, where it is available.
         """
         for ignored in range(count):
-            y, x = 0, 0
             while True:
                 y, x = randint(0, self.height - 1), randint(0, self.width - 1)
-                tile = self.tiles[y][x]
-                if tile.can_walk():
-                    break
+                try:
+                    tile = self.tiles[y][x]
+                except Exception as e:
+                    raise Exception(y, x, len(self.tiles))
+                else:
+                    if tile.can_walk():
+                        break
             entity = choice(Entity.get_all_entity_classes())()
             entity.move(y, x)
             self.add_entity(entity)