Good old game are always good! Congratulations man. Very good emulation. I have nothing to say about the game. I didn't find any bug. I loved the different powers you can gain. I don't know if you will keep working on the game. If so, maybe add a background music will be cool.
Good luck for the contest! By the way, feel free to try also my game and leave me some comments. I will appreciate. You can play it through my signature.