SpaceShooter

[Gors]

go for the art style you have right now, except the asteroids. the bright ships look good in game design point of view: readable and contrasts well with the background. otherwise the bright shots and rocket boosts would bring more attention than the ship itself.

do a rock texturing with even shading, so you don't need to animate it frame-frame: you can tell the programmer to apply a simple rotation animation, saving you lots of work and still being good gamedev wise.