Really enjoyed playing though this one :) I was instantly worried about the controls since 3D platformers in jams aren't always the smoothest experiences, but you really nailed it! I didn't once feel like I was cheated out of a jump or uncertain about what I was supposed to be able to do and not do!
I would love to see this fleshed out into a full game with the progression mechanic built out a bit more. It seems you have some neat ideas and I'd love to see more of them! My one complaint was how shaky the physics could get on moving platforms, but it wasn't anything all that terrible. Nothing a little bit of post-jam polish couldn't fix
Good job :)