Very clever little game! Nice use of the limited color palette and keeping things simple. The hints were very welcome, so thanks for adding those (finding the last ending took me a while but the hint helped). My only critiques would be a) sometimes trying to platform onto single blocks can feel bad due to the low-friction feeling when trying to reverse directions (especially in the cave), and b) while it was really neat to have the music vary between the different states/areas of the game, it could be nice to play around with some melodic variations as well so the main melody doesn't become stale. Overall super solid entry. Excellent work!