Gonna be honest, I almost gave up on the third level... BUUUUT I discovered the shell jump and OH BOY, the game became 1000% more enjoyable! :D
I loved this momentum-based mechanic, and I can already see speedruns being made for this game.
You should’ve included a tutorial for this mechanic though.
So yeah, overall, the game is pretty fun and has some really clever puzzles in it.
Good job! :D