Very fun
This is the kind of game that you don't want to stop playing, and luckily most people probably won't have to as it's not mind-numbingly hard. I scored 128735... not enough to get on the scoreboard =P
It obviously wasn't very complicated visually speaking, what with ships just being simple shapes, and your character a five(I think? Didn't really count) five sided thing. I guess that's the point though, it's supposed to be a throwback to the original asteroid shooter game.
I enjoyed making the colored guys shoot eachother, and even knocking them into their own shots.