Pretty nice concept for a game! The dice randomly choosing platforms can make for some nice interactions. The audio mixing could be a bit better as the track seemed a bit louder in game + sfx was even louder than that. The jumping was probably a bit too low as it was impossible to jump to higher dices and progress onwards most of the time. I was stuck on the same level for awhile waiting for the hand to keep rerolling which didn't really feel the greatest. If you continue on with the concept some things to look into would be coyote time and jump buffering as they really help improve the platformer experience.
edit: forgot to mention. the concept of the hand is great