W,A,D to move and press S to crouch on floor, or stomp while in air(Stomping is how you damage the boss) it is possible, just really hard This was about to be a full boss rush game, but then I realized scratch isn't fit for that sort of thing. Maybe I will revisit this when scratch 3.0 comes out (I didnt make a death animation so when you hear a l o u d sound you beat him)