Thanks for the love and feedback!
Here are some responds and notes.
* Epilepsy warning added, thanks for the reminder.
* Gameplay : The game was initially targeted to be a 2P game, one controls spin and the other controls the timing, then the role swap would make a lot more sense.
However, it was sooooo difficult that even veteran rhythm gamers couldn't handle it.
So the timing part was removed and the role reverse was changed to "controlling the mouse" and " controlling the arrows".
* Discrete/Continuous control : This was a hard decision. Discrete turning would have more control, but intense tapping might interfere with the feeling with music.
We ended up with continuous spinning and gave a wider angle and timing detect range as compensation.
* UI and other ingame feedback : We only added the filled note when you hit one successfully, hoping to not overwhelm players, (and it already is sometimes overwhelming LOL)
Thanks again for the kind words and constructive feedback!