You hit the limitation on the head! A great game, I liked how you used the ceiling as well. The game's resolution is a little small, the player could be more interesting looking and it needs music! My other advice is to make R actually restart the game instead of a pause menu. Usually I just use P for pause and R for an instant restart, it was annoying having to use my mouse each time I messed up. Fantastic game overall, but I wish there was music.