Was entertained by the opening cutscene, added a lot of character XD Like the idea of a dice exploring a dungeon and going on an adventure!
As a next step, maybe you could try to make the fact that it's a dice more integral: for example, the player could have more control over how much the dice spins, and hitting with a higher number-face could yield higher damage - you'd then also have to think about positioning the dice for optimal damage.
But these are just some ideas for future directions; overall good work!