Add ladders in the map

squirrelbattle/interfaces.py

@@ -198,6 +198,7 @@ class Tile(Enum):
     EMPTY = auto()
     WALL = auto()
     FLOOR = auto()
+    LADDER = auto()
 
     @staticmethod
     def from_ascii_char(ch: str) -> "Tile":
@@ -222,6 +223,12 @@ class Tile(Enum):
         """
         return self == Tile.WALL
 
+    def is_ladder(self) -> bool:
+        """
+        Is this Tile a ladder?
+        """
+        return self == Tile.LADDER
+
     def can_walk(self) -> bool:
         """
         Check if an entity (player or not) can move in this tile.