Nice concept. As someone who made a game with a very similar look and feel , I appreciate some things you went for. Pointing to the number on the side without me having to rotate the camera is very appreciated. I also like that you managed to implement slopes as a puzzle mechanic. I thought about it during the jam, then just decided that having switches and bridges is enough, and went on to pretty up the graphics instead.
If anything, I would drop the isometric camera angle. It forces player to remember, and not instinctually feel, which button moves the die in which direction.
Nice tutorial section, also. Great job implementing this in 2 days.