Adds boilerplate for game state

world.py

@@ -41,13 +41,12 @@ class World:
                     yield entity, component_storage
 
     def get_components(self, entity: int, pop=False):
-        for componentstorage in self.registry.values():
-            if entity in componentstorage:
+        for archetype in self.registry.values():
+            if entity in archetype:
                 if pop:
-                    return componentstorage.pop(entity, None)
+                    return archetype.pop(entity, None)
                 else:
-                    return componentstorage[entity]
-        return None
+                    return archetype[entity]
 
     def tick(self, *args, **kwargs):
         for system in self.systems: