That's still insanely huge for such a small game 0.0
My guess is the music? Unless he's using a ton of random huge libraries.
EDIT: ah, yeah, .wav files would do it.
Scored 252! I am awesome! :p I have to admit, that was more fun than I expected, probably just because the music somehow fits the craziness of it all. My suggestion, somehow reward the player for firing less. I noticed that it really boiled down to me spamming fire until my weapon overheated, then spamming it again. I didn't really get rewarded for "carefully shooting". If I was supposed to, the reward wasn't noticeable.
Still, oddly fun game.