I wasn't able to pay attention to the story, as the text is too fast, the characters look the same, and I was kind of busy killing things when they wanted to talk. Eventually, it got to the point where I could just leave my guns/ships to fight for themselves (as I'm doing now), and that's just not very much fun for me. This game looks like a sweet shooter game, but it's actually a TD and you tricked me into having fun playing it (for a while). I gave it a 4/5 because I really like the power up screen, the AI is phenomenal for a flash game, and it's generally addicting, even after I stopped firing my gun. Great job.
Very buggy, too. I don't know what I did, but the ball decided to start going through the bricks. I also got the "CLICK TO BEGIN" thing constantly up there, so I click and it resets the ball at a higher speed. One could continue until they couldn't click fast enough.