fix items map

src/main.rs

@@ -89,7 +89,7 @@ struct Room {
     palette: String, /// id
     name: Option<String>,
     tiles: Vec<String>, /// tile ids
-    items: HashMap<Position, Item>,
+    items: HashMap<Position, String>, /// item id
     exits: HashMap<Position, Exit>,
     endings: HashMap<Position, Ending>,
 }