So satisfying!
I found it quite similar to https://itch.io/jam/mini-jam-203-flow/rate/4251228.
Unlike it though, you nailed what I'd argue is the core aspect: hitting notes to the beat.
The SFX are also better integrated, although the "fail" buzzer is a slightly too loud.
Personally I don't care for Christmas songs at all, yet I still had quite some fun!