great concept, would have been twice as fun if barely tapping the buttons didn't send you flying across the screen. at one point it took me four tries to jump over a cube without knocking it off a button just because you move so fast. maybe it's just my computer. 4/5
Seems to have some bugs... after about 3-4 replays the extra turrets stopped working (wouldn't fire at all), and after about 5-6 i started getting asteroids that were unaffected by my bullets at the very beginning. Couldn't get past 10 seconds at that point, so I had to reload the game. Beyond that, the concept is good and pretty fun, but it could use a little more variety.