That’s a good idea, nice to work on the ability to memorize and reproduce rhythms! I feel there should be a limit on the number of times you can repeat the beat. Being able to just replay it any number of times trivialize the exercise IMO (but then it’s on the player too not to optimize away the fun :P).
I did have a bug at the… 4th level I think? Where the music was validated, but didn’t move to the next level, and I had to quit the game.