diff --git a/squirrelbattle/interfaces.py b/squirrelbattle/interfaces.py
index 556f55c..472ee95 100644
--- a/squirrelbattle/interfaces.py
+++ b/squirrelbattle/interfaces.py
@@ -144,13 +144,9 @@ class Map:
         for ignored in range(count):
             while True:
                 y, x = randint(0, self.height - 1), randint(0, self.width - 1)
-                try:
-                    tile = self.tiles[y][x]
-                except Exception as e:
-                    raise Exception(y, x, len(self.tiles))
-                else:
-                    if tile.can_walk():
-                        break
+                tile = self.tiles[y][x]
+                if tile.can_walk():
+                    break
             entity = choice(Entity.get_all_entity_classes())()
             entity.move(y, x)
             self.add_entity(entity)
diff --git a/squirrelbattle/tests/game_test.py b/squirrelbattle/tests/game_test.py
index 6751016..ab66cb3 100644
--- a/squirrelbattle/tests/game_test.py
+++ b/squirrelbattle/tests/game_test.py
@@ -148,6 +148,9 @@ class TestGame(unittest.TestCase):
         self.assertEqual(KeyValues.translate_key(
             self.game.settings.KEY_WAIT, self.game.settings),
             KeyValues.WAIT)
+        self.assertEqual(KeyValues.translate_key(
+            self.game.settings.KEY_LADDER, self.game.settings),
+            KeyValues.LADDER)
         self.assertEqual(KeyValues.translate_key(' ', self.game.settings),
                          KeyValues.SPACE)
         self.assertEqual(KeyValues.translate_key('plop', self.game.settings),
@@ -338,7 +341,7 @@ class TestGame(unittest.TestCase):
         self.assertEqual(self.game.settings.KEY_LEFT_PRIMARY, 'a')
 
         # Navigate to "texture pack"
-        for ignored in range(11):
+        for ignored in range(12):
             self.game.handle_key_pressed(KeyValues.DOWN)
 
         # Change texture pack
@@ -609,3 +612,34 @@ class TestGame(unittest.TestCase):
         # Exit the menu
         self.game.handle_key_pressed(KeyValues.SPACE)
         self.assertEqual(self.game.state, GameMode.PLAY)
+
+    def test_ladders(self) -> None:
+        """
+        Ensure that the player can climb on ladders.
+        """
+        self.game.state = GameMode.PLAY
+
+        self.assertEqual(self.game.player.map.floor, 0)
+        self.game.handle_key_pressed(KeyValues.LADDER)
+        self.assertEqual(self.game.player.map.floor, 0)
+
+        # Move nowhere
+        self.game.player.move(10, 10)
+        self.game.handle_key_pressed(KeyValues.LADDER)
+        self.assertEqual(self.game.player.map.floor, 0)
+
+        # Move down
+        self.game.player.move(3, 40)  # Move on a ladder
+        self.game.handle_key_pressed(KeyValues.LADDER)
+        self.assertEqual(self.game.map_index, 1)
+        self.assertEqual(self.game.player.map.floor, 1)
+        self.assertEqual(self.game.player.y, 1)
+        self.assertEqual(self.game.player.x, 17)
+        self.game.display_actions(DisplayActions.UPDATE)
+
+        # Move up
+        self.game.handle_key_pressed(KeyValues.LADDER)
+        self.assertEqual(self.game.player.map.floor, 0)
+        self.assertEqual(self.game.player.y, 3)
+        self.assertEqual(self.game.player.x, 40)
+        self.game.display_actions(DisplayActions.UPDATE)