Very nice and chill game! The deck-builder-style strategy is good. Others have said changing the strategy mid-match would be good. I agree, but think you could lean into the deck-builder aspect here. 

For example, you have a "deck" of moves. At the start of a match, draw 9 moves and select 6 to place on your die. after each roll, the move that was rolled is removed from the die and you pick one of your 3 remaining moves to replace it, then draw another move from the deck. That way, your strategy can evolve over a match to counter your enemy's changing die.

I enjoyed playing though, keep it up :)