Art: I dig it.
Controls: decent, although the cannon aiming was a bit frustrating since the bullet was so small. I kept thinking that I had a really accurate shot, only to miss by a couple pixels resulting in a crashed ship.
Overall mechanics: Good, although I think there may be a bit more potential in there.
The first few levels didn't give me a lot of optimism, but you won me over with the 2 ship tier. Fun stuff.
Thanks all. I took some of your comments and made a few adjustments to the game.
You need a better buying system. Start off at 70% cost then raise it up 90% 120% 150%. Add the ability to purchase better controls/stability, Speed boost packs, smart laser targeting to hit objects and not stellar bodies.
Fairly decent although a little bit too easy, completed it 100% within about 40 minutes. You might want tot hink about adding another upgrade or something just to get rid of the redundant $21
Good interface, I thought that the art was good as well.