Really cool idea! I loved that there seemed to be multiple solutions to some puzzles depending on your skill level. Like early in the first couple levels I started messing with changing colors while scaling certain areas and ended up climbing up parts of the map XD. Also want to throw in that I appreciated that in level two there is a gemstone behind a wall you haven't been told how to interact with yet, and so you can figure it out or be told in the next level. That's good level design to pull players back and forth between your levels :D
I'm assuming the gemstone looking things were supposed to be indicated on the level select screen when you've picked them up as extra collectibles, but it seemed like it wasn't saving that I picked them up.