Less complexity on the handle key function

squirrelbattle/game.py

@@ -155,6 +155,12 @@ class Game:
         elif key == KeyValues.WAIT:
             self.map.tick()
         elif key == KeyValues.LADDER:
+            self.handle_ladder()
+
+    def handle_ladder(self) -> None:
+        """
+        The player pressed the ladder key to switch map
+        """
         # On a ladder, we switch level
         y, x = self.player.y, self.player.x
         if not self.map.tiles[y][x].is_ladder():