Cool tracks, sound, looks great:P A bit hard, but Carlos won;p And wow You created this yourself, very nice.
To decrease difficulity in a "normal" game edition, would nice to have scrolling parts and user controlled parts - You know, one time there's pressure, the other time the player dictates the tempo. And both section could have different puzzles/mechanics - quick ones, and more precise, puzzly ones.
Theres not much to give advice for, except maybe... instead of multiple controls, maybe gamepad support would be better? (I didn't test it, maybe its there)