This was a great concept, but I was able to jump on the boomerang, but not easily- the player is too "slippery" for this kind of platforming and the boomerang movement is too chaotic when thrown- but maybe it is just me that I am bad at platforms :-D. I would suggest to let the boomerang move predictably after thrown (e.g. like Mario Odyssey) for a better experience. I liked the mood and the aesthetics the most. Great job!

Soo it started out okay, but then I couldn't figure out what to do after the boxes. I double/triple jumped over them. Then I got to the screen with the spinning bones/grey thing. I tried to double jump but couldn't. I think that screen was a tutorial for the upcoming item, but I couldn't get to it. Not sure if I was missing something or if something was missing from the  game.  Was good up until that point