Entities are living during two ticks, fixes #80

squirrelbattle/entities/items.py

@@ -232,14 +232,19 @@ class Explosion(Item):
     """
     When a bomb explodes, the explosion is displayed.
     """
-    def __init__(self, *args, **kwargs):
+    living_ticks: int
+
+    def __init__(self, living_ticks: int = 2, *args, **kwargs):
         super().__init__(name="explosion", *args, **kwargs)
+        self.living_ticks = living_ticks
 
     def act(self, m: Map) -> None:
         """
         The bomb disappears after exploding.
         """
-        m.remove_entity(self)
+        self.living_ticks -= 1
+        if self.living_ticks <= 0:
+            m.remove_entity(self)
 
     def hold(self, player: InventoryHolder) -> None:
         """