Wow, this was really really fun! It reminds me of games I'd spend hours and hours playing when I was younger on flash game sites. REALLY clean looking, and controls super well. I love the style as well.
What REALLY stood out to me is how the shooting mixed perfectly with the music, I'm not sure if you did it on purpose, but if you did, it's amazing. Good job.
Edit: I just noticed the little indicators on the homing lasers, point in the direction you're going in. Really really cool, tiny little polishes like that really make me smile