Agree with Mariothedog that logarithmic zooming would be better & more natural (basically instead of adding/subtracting a constant to the zoom you multiply/divide it), and that diagonal movement would be nice, or maybe movement should perform acceleration (and not constant velocity) e.g. like on a real spaceship. The game also started lagging a little when I got about 15 guns on me. Nevertheless, the idea is very cool & it was real fun having so many guns and shooting all around, great job!