I totally didn't waste all my points trying to get the big gem...
I really enjoyed it but it also made me want to turn my face inside out lol I'd say you should probably make the difficulty change a little more gradual, or maybe you should look out for tight spots that makes the player do precise very precise jumps and make sure there's not like five of these one after the other. (At the beggining of the game, I mean). Unless, of course, you wanted to make a hard or rage-quit game.
Also I love the blob sprite idk why