This definitely is one of the high effort submissions in this jam. Very, very very excellent art -- love it very much. Excellent worldbuilding. Good lore too. Cute game overall.
My little bit of complaint is the slightly clunky control. It's quite uncomfortable that the double jump can only be activated during the descent phase -- this leads to the double jump not activating when wanting to double jump in a hurry.
Also... the boss... I think it's way too brutal. Finally beat it after three tries though but still... it's way... WAY too hard (and people say my game's boss is hard lol). Firstly I think the boss should have half its current health -- after figuring out the necessary tactic to beat the boss, the fight is very monotonous, although extremely mentally taxing. Having that much health makes the fight a little bit boring. Secondly, keeping track of the giant nut is hard enough; also keeping track of some debris is... kinda impossible for me. Sometimes getting hit by debris when double jumping to hit the boss after making sure no nut is above me is just... cruel. I think you should at least contrast the debris a bit so that they're visible without needing to focus too much on them :(
Anyway... I'm going to make a let's play out of some submissions to this jam. Expect your game to be there ;)