This game was okay.
The ship's autofire doesn't help the interactivity, and actually causes a little lag when it's constantly firing when there's no enemies on the screen. The lack of a quality toggle or a music toggle doesn't help at all.
Like other ship-based shooters, this game got repetitive after a while, and didn't really offer much to keep going. The power ups stopped after about six upgrades, and even those weren't that great.