Incredible Implementation of a pretty cool idea.
At first, I thought it was just another platformer with a cube. But, soon I realized how wrong I was. It plays with your mind once you get the hang of it. You have to pay attention to every move. The mechanic of moving the dice according to the number on the top is a fantastic and relatively fresh idea. And the music and the sound design are really good as well. Like the fall and replay sound is very subtle but gives a proper feedback.
Future additions can be a UI menu and a restart button. You can also work on implementing better camera angles and focus. And the ability to change camera rotation would be a nice touch. Otherwise well-done mate.