Not bad for a first attempt, certainly better than some of the other things I've seen here. However, there are a few issues. The first thing I found annoying was the intro, there should be a more obvious way to skip it (Perhaps a button in the corner?). The fact that the ship can only turn 45 degree angles is probably the biggest flaw to the actual gameplay, asteroids is about precision shooting and that can't happen if you're aim is limited. Another issue I found was that if you turn while moving, you will continue moving in the same direction until you release the movement key, rather than moving you in the new direction as would be expected.