Fun game, pretty zen. Two issues:

Controller only.

The speed-up makes getting into a flow-state annoying - you get used to one speed, then have to adjust. Thank you!

Why only controller? You had no choice? Anyways I HAVE a controller :) But how you can see lost of people does not. 

Music is surprisingly relaxing, in classical style. Game is challenging. I've got only 500 meters and died a lot. Because when things speed up, it's really hard to keep the rhythm, too hard. Concept is unusual, pressing buttons in rhythm is  enjoyable, for some reason.

I don't have a controller, so I won't be able to actually play and rate your game. It does sound really interesting though. 

Unfortunately I dont have a controller I can use with my PC, the art looks good though!

Controller only?