Nice API.
I think API is really neat and I am very impressed by what some Flash authors have been doing with it in the Flash Forum of the BBS.
I'd say this game is pretty damn cool and by far the best thing I've seen at under 2 kb.
The places that I would suggest improvements are using a more natural 8-way movement for the ship, the 4-way movement seems very limiting, and make some adjustments to the scoring system. It seems a bit frustrating that the farther you manage to get the less score you have until it reaches zero and you lose.
Still a great game and awesome job on the scrolling backround, it looks amazing!