very popular idea.
the feeling could be improved in my opinion by speeding up the dice rolling animation to make it more snappy. I would also look into easing modes to make it feel even better.
as far as puzzle design, i think you could do better. in all cases i encountered, i had plenty of space to maneuver the die however i wanted. for this to be an effective puzzle, i can't be able to move that freely. also, the level with two dice didnt seem to utilize the concept at all. i was always only moving one die at a time. if you want to make a puzzle where i move one die at a time, just make two seperate levels each with one die.
also, the camera is angled very low. this makes it pretty hard to see whats going on.