Interesting. I did run into a bit of a bug where I apparently shot down an enemy right on top of me, and I was never able to move again (as you can imagine I didn't last long ^_^ ) I guess something weird happened with the collision or something.
I did think it was a bit difficult to control - using exclusively wasd and not the arrow keys to move while using exclusively the mouse and not other keyboard keys to do the other actions is always tricky for me, so that could probably just be me, though having alternate controls is always nice.
Liked the ship designs and effects. Cheers!