@@ -0,0 +1,180 @@
+package com.example.rollingball.app;%0A%0Apublic class ItemGameObject extends GameObject%0A%7B%0A  private final Item _item;%0A%0A  public ItemGameObject( final Item item )%0A  %7B _item = item; %7D%0A%7D

fix #72 ItemGameObject impl placefolder level.