Wicked!
It's kind of funny the way you can simply plow through some of the ships, and how you can take so much damage. I really liked the idea of it, but perhaps it would have been more interesting if instead of getting smaller as you lost health, you could split into two asteroids, one WASD and one arrow keys, and perhaps them getting smaller from there? I don't know. Great game! Good physics, good simple graphics, good layout, good presentation. What more could someone want from a survival game?