Nice game, I really like the idea, the art was nice and the ghost was fun. I have some comments that could help. First, the mouse seemed to follow the center of the screen instead of the player and that makes it a bit difficult to aim, also you could add something to tell you how many lives you have, and last, I think the 3rd room was working weird cause the enemies wasn't shooting. Besides that, really fun game, I also liked how you make two differents tipes of room, one static and one mooving. I think this game with more levels will be really fun. Nice job!