Cool puzzle concept. Brilliant usage of the paper-stamp analogy to explain the mechanic effectively. The progression of puzzle difficulty was very well calibrated. I personally don't have a strong intuition for the spatial properties of a dice, so in practice I ended up just rolling around in a 2x2 circle aimlessly until I got the face I wanted in the position I wanted. The kind of spatial intuition I'm talking about reminds me of Rubik's cubes. Since I don't have that intuition, the faces of the die could be in any arrangement and I wouldn't be able to tell the difference. Due to this lack of intuition I was not able to plan ahead, so I wasn't thinking much at all, but that didn't stop me from eventually stumbling into a solution. I was never forced to think carefully about what I was doing and how it would help me solve the puzzle. It's clear that you spent a great deal of time internalizing the theory of cube rotations in order to design these puzzles, but players of your game probably won't reach close to the understanding you have as the designer.
Viewing post in Roll Of The Dice jam comments
I see. Rolling around in a 2x2 circle only gets you a limited amount of possible orientations, so I deliberately designed puzzles where that strategy wasn't the solution, but it is possible I may have overlooked some solutions when designing the levels. I hope that didn't take too much away from the experience.