I just tried the latest version from your dropbox. The visual wireframe style is great and the effect while rotating is really smooth. Maybe you could add white points (starfield) flying by in the background?
Some questions on the gameplay though: Do I actually have to destroy the asteroids? It's quite easy to reach the checkpoints by collecting clocks and just avoiding asteroids and slow downs. Also I haven't really figured out why one should use the secondary weapon (except to test what it does ). I found it much easier to use the primary weapon if I really wanted to destroy an asteroid. Btw I also discovered how to cheat: if you don't have a secondary weapon, but keep fire button pressed long enough and then collect a missile while fire button is still pressed, it's launched immediatly .
To sum up, this is a really nice game, but there should be more motivation to shoot those yellow asteroids.