I wish I had managed my time better to ask more people to play my game so I could fix the control difficulty. I have some ideas to make it much better for the post-jam version. About jump height, I know I forgot to make sure players know about it but you can jump mid air and do double jump or triple jump, it's actually the only way to get some of the orbs, though I know it's a really hard maneuver specially to reach the crystal, which requires at least a quadruple jump.
Btw, thank you so much for playing my game. I'm glad you liked the environment :)