nice job, man
hey, this is pretty good. I mean, I see no reason NOT to like this game; the music was good, and it was just kind of a neat little game.
Conversely, it's not the BEST game out there right now, but then again, it's just a preview, so betas are always a little worse than the full thing.
I think some improvements would be to have a limit on how many shots the enemy can fire at once, so that way, when you do die, there's like a second or two of regeneration, but not so much as it feels like, say, Galaxian. It could benefit from some powerups, but like you said, it's getting worked on. It would be nice to have like a set amount of lives, a new life from beating a certain enemy that pops up from time to time, new level backgrounds, music and stuff like that.
Either way, nice work :)