It's so simple, but I can tell you spent a lot of time making the game feel really good. The music pitching up and down with the gravity made traversing the map really satisfying. Also, I think you did a good job making an "early area" that the player can start to grasp the mechanics in safety but then gives them a moment of awe when they look up and see all of the platforms high in the air. It creates a neat little story through gameplay, and I love it.