I've played a couple of games with this sort of mechanic, and so far this one has been my favorite. Apparently my spatial reasoning skills are near zero for how dice faces move, but the levels were built in such a way that it was pretty obvious what path I should take. If you're looking to expand the size of the levels and avoid some of the trial and error solutions it might be worthwhile to use a simpler die (e.g., one where the opposite faces are identical).