Wow! For a 48 hour game jam, the level of polish in this game is amazing! While there are other games submitted with a similar puzzle concept, this one is easily the cream of the crop in terms of polish and fun.
One potential improvement could be to have an 'unfolded dice view' (i.e. showing a preview of the dice face you will have corresponding to the direction you move), but I understand if you feel that it might make the game too easy.