I understand that the "roll of the dice" is applied by the player being a dice and changing the weapon randomly. But I think the game needs to be more self-explainatory with that.
How does the dice just "rolls" and changes the weapon? How much time I have before my weapon changes again? Maybe a bit more animations and polish could help.
But overall, it's an interesting concept, and I had fun with the variety of weapons. Good luck!