I found this game to be pretty enjoyable. The best part is probably how you can track where your enemies are. It's weird, because it makes it look like they are in different quadrants. Really, it's all the same square that you can't leave. Eh, I don't know much about geometry. I just like shooting ships.
I thought the sound effects were fairly nice. I always make the mistake of not shaving my ammo on these games. Of course, it doesn't really matter that much, it just looks bad. The designs were fairly good. The title's pretty nice too.