I really liked the thoughtful level design, great job with that! You knew the limitations of how high and far the character could jump, and built the level around those constraints very well. Stuff was spaced out well to fit perfectly if you committed to your jumps. I didn't mind the pits that tricked you from a "the main game mechanic is learning the stage" perspective, but without checkpoints, it did feel a bit cheap, especially on a run where I had like 28 diamonds already.
Some of the platform elements were a little hard to visually distinguish from the background.