A really creative concept, but the 2D feels like it is fighting me. When going up or down hills it feels like the game should help me stay on it just a bit I guess.
I did like the puzzles and having to swap to different color of dice with higher or lower values forcing me to try all of them, I think making it advantageous to use certain dice to control slipping or to get through a timed gate would be cool too to really reinforce the mechanic.