As always, your presentation is fantastic - really love the lighting effects + background particles! Really great idea as well and a nice take on the game jam theme! There would be two things I would ask for as a player, one much easier than the other given the 3 hour dev time.
First off, for the camera to be more zoomed out - the player can jump insanely high with a (nearly) full bar, but more often than not you'd waste it by hitting a platform that was just a tiny bit out of frame. The same is true even for jumping at a half-full bar, so a bit of a wider camera angle gives players more input on their choices.
Secondly, and more difficult, would be some visual feedback on how powerful a jump will be - some sort of a trajectory path to show where the jump will take you. This comes down also to a question of design preference, i.e. how much info do you want to give the player, but for me when the resource is limited to pick ups and a mistake can mean a full restart, a bit more of a visual indication of how high a jump will go would be great.