Man where do I even start
Everything in this game is so well polished and made with care, they way the disc bops to the beat and such, the art is clean and nice and each of the four levels seem unique to their own and have distinct bullet patterns that makes them each memorable. The music is really nice too I enjoyed it :).
The rewind is a mechanic I really liked. You basically had an undo button and you could learn the hard part or the confusing part for you where you naturally without needing to restart a level. Though maybe it could rewind automatically if you lose with a rewind left? I think it does not do that but maybe I am wrong. Also a sfx would have been nice.
I had an issue where in the 4th level when the handle dissapears it looked like it dissaperead too quickly and the last red note hit me lol but this is kinda a nitpick. And I wasn't able to submit my score when I finished the 4th level which kinda sucks but I scored pretty low anyways.
Overall really fun, challenging and well done game :]