Thank you! :)
Haha, yes there are some similarities with your game. I guess that happens when a lot of people are working on the same quote :D
Regarding to the dice rotation: The dice itself is 3d. We set up a scene with an orthographic camera and used primitives from this perspective as a base point for our artwork. Then we imported the assets as 2d sprites in an 3d environment. So everything except the fore- and background are in 3d space.