控制行進：W A S D    瞄準與發射: 滑鼠
武器轉換: 1 2 3 4 5    撿拾物品與開門: 空白鍵
· Movement = use W,A,S,D keys
· Toggle Weapons = 1,2,3,4,5 keys
· To Shoot Enemy = Mouse
· To Pick Up Items and to Open Doors = Space Bar