Nice work! I was impressed with how much you got done in the 48hrs. I really liked the idea of the dice face determining jump height, it could be interesting to see that taken into a full game with slightly less variables than the 6 sided dice. Just so there's a little more control there. I liked the little collectible dice too, the level designs were pretty well thought out as well.
Could spend a bit more time getting the rolling/jumping to have a bit more weight later - the jumps did feel a little float-y for my taste, but the core of the idea is quite strong and it'd be cool to see it expanded upon later.