Add possibility to define the background color of entities (black in ASCII, white in Unicode)

dungeonbattle/interfaces.py

@@ -88,6 +88,13 @@ class Map:
             hedgehog.move(y, x)
             self.add_entity(hedgehog)
 
+    def tick(self) -> None:
+        """
+        Trigger all entity events.
+        """
+        for entity in self.entities:
+            entity.act(self)
+
 
 class Tile(Enum):
     EMPTY = auto()