Good game, I liked the soundtrack and the controls. It wasn't very clear when my health was getting low aside from the counter at the top. More feedback or sound when hitting an asteroid or getting shot would be a nice touch.
The idea is also good, about being the bad guy, but how you acquire points doesn't necessarily match this. You still get points for destroying asteroids, like the original. I think focusing more on what it means to be a bad guy in Asteroids, and how you might win that, would really raise this to new levels!