Nice spin on the theme. Also nice to put it in a D&D theme! Also liked the random path for the enemies. I got to wave 9.
Some issues I had:
Kept accidentally selling my units because I kept clicking on them. I also wasn't sure what the role of the dice was exactly, aside from the number of spaces you can move a unit. I also found a bug where the die didn't dissappear during a round and I could roll it again and I got moves without actually being able to use them. I also tried to move a unit and it instead sold it. I could also make new units, I payed for them, but when I put them down, it told me the party size was too big and removed them without giving my money back. Finally, the music got a bit repetitive after a while.