Well shit, now I just flat out feel embarrased submitting my game!
The visuals are amazing, the music is great, I mean just the MENU looks awesome. Actually regarding the menu my only kinda complaint is that the buttons aren't navigable by gamepad analog stick, or at least wasn't when I tried. This would be almost a non-issue for me personally if the game page didn't actively suggest using a controller.
Regarding the gameplay itself I like the idea of freely moving around the board, but maybe it's because I jsut suck but I found REALLY hard to land on notes. The collision boxes are fairly generous but I do wonder if it might have been better to have it be a guitar hero style lane snapping movement.
Also I encountered what I think is a bug where at the end of a track, nothing happened and there was no win or lose screen, so I had to quit out of the track and my score wasn't saved. The song even restarted but no notes appeared.
Overall though this is insanely impressive, great work!