Stanley's Last Stand

While trying to escape from an evil alien robot space station Stanley is shot in the knee and can not walk, so one of his friends hands him a pistol and they say their farewells.  

Armed with just one pistol can Stanley hold of the evil robot aliens?  

CONTROLS  

-Use the mouse to aim  

-Use the LeftMouseButton to fire the pistol  

-Use the RightMouseButton to fire the shotgun  

-Press R to restart