I didn't like it. That does not mean it's a bad game, but it does not match my standards in a few questions:
Visual - Even "Space Invaders" had a rather clean aspect. The game is visually overriden with colours and pixels and whatnot - it's confusing and ugly.
Storyline - I just couldn't think on it's terms. There is an incoming fleet - not ship, fleet - that knows better to announce itself but has no decoder? The very same one used on the human ships, that had, by accident, the decoding key of a number of ships comming from a place called "black sector" that should spawn nothing?
I had no fun myself. Game has a nice soundtrack and many people seem to have enjoyed it, so, if you're reading this, you'd do better in trying for yourself. :)