Added pickups and doors

game/doors/closed_door.gd

@@ -0,0 +1,18 @@
+class_name ClosedDoor
+extends Door
+
+
+func _is_key(_node: Node) -> bool:
+	return false
+
+
+func _can_open(body: Node2D) -> bool:
+	if not body.has_node("Pickups"): return false
+	if not body.has_method("remove_pickup"): return false
+	
+	for pickup in body.get_node("Pickups").get_children():
+		if _is_key(pickup):
+			body.remove_pickup(pickup)
+			return true
+	
+	return false