Fun
You've got a pretty fun game going here. Just a couple of suggestions to make it better:
Make the score display while playing much bigger and bolder, it is hard looking at something so small while playing 0_o.
Also, make some big awesome explosion or something cool when you lose! It's not cool being instantly teleported back to the start screen when you lose >_<. Maybe have the game over screen show your final score for that play-through?
Good luck!