I've seen a lot of puzzle games using the turning of the faces and landing on the correct side to overcome certain obstacles, but this one is so far my favorite concept.
I like that you pick up sides as you go, and reaching the victory point you still have to be able to roll in a way to get it on the top, which felt very nice.
Like you said, you didn't have time to implement everything you wanted, so my only complaint being that its a little confusing to confirm which side of the die you are on with the visual provided, but I am sure you are aware of that. Very nicely done!