I've played a lot of games like this, but yours is the most polished one I've seen of all. Very good job! And normally I detest move limits for puzzle games because I feel they discourage exploration and add unnecessary pressure, but in this game I felt the move limit played a subtle but still noticeable and positive role in the puzzles, discouraging aimless rolling around but not feeling intrusive at all, and even preventing a particular solution in the "5 and 4" puzzle (forgot which level was that, but because of the move counter you basically had to get the 4 before the 5).
Also, a very small niggle, but the dice movement could be a bit faster. Still, this didn't take much away from the overall experience.