certain sections are super hard like right in the middle of the level maybe you could gave put them later in the level that would be better
also the backgrounds can be utilized far more efficiently if you use some other tiles like maybe it can be a castle and the bridge is up so you are climbing over the moat with the trampolines
specifically like the 3rd last level has a section where you need to do the exact same maneuver over and over again that part needs something on top of it to keep the player engaged the easiest solution would be the bg for example you could color the spaces between trampolines differently and players would enjoy it much more, I left the game for a whole day because that section frustrated me so much