As a rhythm game player, I enjoyed the game and challenge that it came with. Being able to adapt to the loop is a fun mechanic to play around. Two main things I'd love to see in the next iteration are visual effects (feedback how close you were to nailing the note, which helps with keeping on timing), and the judgment line be horizontal instead of vertically on top. The vertical layout is ok, but is not as intuitive, unless you map the keys vertically on the keyboard as well. Other than those, great sound track and concept! Would love to see where it goes from here :)