Rating and comment based on Video (as i'm on a Mac, and there's no WebGL Build.. please make one! :P, but good job adding video to watch as it gave me a good feel).
Great art and sound, great theme implementation (both confinement and bullet hell), looks quick to get to grips with, but also fun to play. And for a solo dev in 10 days as well! Great going! Hope you slept! :D