Great first start. I played for about 1 min. before being done. I think the biggest negative is that my ship orientation has nothing to do with either my movement or my gun. having mouse-controlled guns and arrow-controlled movement may be challenging, but not in a good way, IMHO. I think this would be better with classic asteroid-style ship movement (if you built this in Flash, check out Keith Peters "Actionscript 3.0 Animation - Making things move!"), a fixed front-oriented gun and sound effects. I'd also like to see more interesting things to shoot. Try also having big asteroids split into two--or maybe split open with a baddie inside. Lots of fun options.