Fine idea for a game. However, there are a few bits you may have forgotten.
Firstly, the /SOLE/ reason I lost the first ten times was because the head/mouth things kept popping up RIGHT on top of me, or in front of me. I also saw them spawn on top of the spike ball, too.
Secondly, the movement is fairly slow. Good for a small room, but sometimes it gets a bit... Just, I should say it should be a tiny bit faster.
Lastly, the eyes. They seem useless to me, except for score, and score hasn't been a big deal for me ever since the NES came out. "Atari was for score; but not any more." Remove them, or put them on the walls. I kept thinking they were dangerous.