Lovely idea, I hate it!
Overall it was quite fun in that ragebait-y way and i ended up trying it for way too long. i ended up giving up in the apartment roof level, i got to the wooden piers a handful of times but didn't manage to tie it all together.
few bits of feedback:
1. The game reaaaly begs for some sound effects, doesn't need much, but something other than that track on loop would have been nice. A crash sound, maybe a sound for the pedals, a sound for the keys changing. This to me honestly was the biggest issue.
2.one of the more frustrating things for me was when the new keys would spawn out of the screen, so i couldn't actually see the keys. that killed a fair few runs for me.
3. i think the instant death when touching obstacles/trashbins is maybe a bit too harsh, having some sort of min velocity component to the collision i think would feel a lot better.
I agree with the other commenters on maybe limiting key combinations to one side of the keyboard, I think it would make it a bit more accessible while still keeping the ragebaity difficulty. i have big hands so it's not as much of a problem for me as i could almost span my hand between the left arrow and 1 keys.
But overall a really fun concept and it had me sucked in for a bit even though i felt like i don't want to keep playing haha. Great Job!
Also, really nice looking itch page !