Very interesting concept and beautiful graphics!
Didn't finish the castle, though. I don't have an hour to spend on a single game level. But I saw a comment saying they spent 3 hours to finish that one level, so maybe there's a public for that ¯_(ツ)_/¯
I would still advise adding a few save points in this level so the players don't get bored doing 100X the same platforms.
The rest of the game is really nice! The backgrounds are beautiful and always changing, there's a lot of imagination in the way the platforms are placed so we have to adapt our strategy. There's a lot we can do with just one button 👍