~~playing an instrument in real life~~ Trombone Champ? Linked you to their site because they have a lot of links for different platforms. Not sure how much of a game Synthesia is meant to be vs a piano tutorial (I will give them that their URL is synthesiagame) but figured I ought to give that a mention too. Rhythm Hell is short but free for PC, and got picked up a lot by the YouTube algorithm if you watched a lot of music stuff aimed at a musician audience.
Not a rhythm game person at all despite being a musician, but some come to my attention anyways and if they do, I don't mind trying to help small niche communities on Lemmy. Thanks for running this community and trying your best, I am in a similar position with [email protected] and [email protected]. I am not an expert for any genre I mod, but hey, someone has to do it. I'd gladly cede power to an expert, but they are not here yet, so I'll do for now.
I did enjoy Symphonica for iOS, mostly rhythm game with visual novel-style interludes but they took it off the App Store. There is a YouTube channel surrounding trying to preserve it.