Here's a pretty cool game I stumbled on today called Mutant Storm. Very polished. It's almost like Robotron crossed with Asteroids but with modern graphics. It's awesome if you have a controller with 2 analog sticks. I have this PS2 controller adaptor and it worked perfect! Otherwise I managed to get it playable keyboard only by reconfiguring the controls to AWSD for shooting and UpDownLeftRight for moving. Maybe you can get used to some of the other ways of controlling it. Check it out!