I really like the concept and the audiovisual aspect, but the gameplay feels a bit plain - all enemies die quickly without posing any real challenge or forcing me to change strategy. The movement also feels a bit sluggish, which is weird for a fast-paced game about going fast.
A little technical problem: an FPS limiter or similar would be great, since if you don't enable VSync (which is off by default) it'll use up all your GPU unnecessarily. But if VSync creates issues on your system, you're out of luck.