Thanks for the feedback! You're the first one to ever comment on one of my games. This is one of those games that was way more fun to make than to play. I myself only beat that hard level only once. It's janky because I was figuring all the collision and movement logic as I wrote it and didn't really ever come back to polish it. The thing is that it takes 20% of time to get game to the state like this and 80% more time to polish it (which is boring and useless because I'm not gonna advertise the game anyway).
Anyway I made a similar game couple of years ago which is kind of a successor to this one so if you're interested check it out https://minze-melone.itch.io/over-jump.