Great stuff guys! Very nice submission.
I liked the simple but polished style of the game. Both in visuals and gameplay.
Some minor nitpicks were that I was missing a bit of the "Roll of the Dice" vibe in here. I understand I am playing a die, but apart from it being a cool cube with dots on it, it didn't add very much I feel. Though I guess the theme is pretty optional, so don't worry about that one too much. ;)
The die texture seemed a little blurry somehow. Perhaps you could incorporate the dots into the mesh and use vertex colors or a different material for those. Or just upscale the texture I guess.
Otherwise, music, level design and gameplay were all very good, nice job!