Neat concept & prototype.
Did come across two bugs:
A: Unless I'm misunderstanding it, the "deal 3 damage for each repeated face" face seems to be glitched; had a die with three repeat faces on it and one of that kind of face, and that face only ever hit once when I used it.
B: Did have an incident where I tried to drag an attack face to one of the boxer enemies, and the game did not let me do so; the die was stuck to my cursor. I ended up having to quit out of the run.