934 High-score! I liked it a lot, perhaps my only suggestion would be to have the enemies spawn in more of a wave-thing. Because at the moment, you didn't really have time to chose your upgrades - as soon as you looked away at the icons - asteroids punished you at once.
I guess after a few more tries you get to know where the buttons are and what's what so perhaps that's not much of an issue. ^^
The game looks very welded together and it feels really good to play! Well done. :)