Pretty nice, I like the background and music, it helps with the abstractness. I played as well as I could and got to over 7000 points and then I realized that getting hit doesn't cause you to lose the game but only lose points, then I reset the game and played in reverse and got to -8000 or so to see what would happen. The game never ends, it will go forever. Other than that, the game ramps up in speed nicely and had me focused on matching the right direction. The visual feedback is really good! The score text scales and there's lots of particles.