Fixed compilation error by making methods in game object simple test public.
Fixed compilation error by making methods in game object simple test public.

ninasun/game_engine,ninasun/game_engine,PinPinx/TD_Game_Engine,Jgilhuly/VoogaSalad,keikumata/CS308_Tower_Defense,keikumata/CS308_Tower_Defense,brandonnchoii/VOOGASalad,brandonnchoii/VOOGASalad,PinPinx/TD_Game_Engine,Jgilhuly/VoogaSalad,jeremydanielfox/game_engine,jeremydanielfox/game_engine