Great presentation. I like the dynamic music, the screen shake, the neon esthetic, the cathode-ray tube filter... good stuff.
Unfortunately the controls felt just a little too slow and stiff. I basically could not destroy an enemy without losing 1/3 of health, so on any screen with 3 or more enemies... I was basically stuck. :)
I also noticed that you can continue to fire, even after the enemies have destroyed you.