Awesome!
It's a little annoying to have your hands shooting the entire time but it makes sense. Maybe if they were laser beams instead of a rapid-fire gun and the audio was more continuous, it would be less distracting.
It's hard to shoot with two hands and maneuver at once, but I like it! It feels like it could have a good difficulty ramp. I would probably appreciate some good no-shooting sections to rest my hands (maybe they're in there, I never got terribly far).