Really solid, I like the creative way dice are used here. Combining movement with attack power is simple, intuitive, and elegant. It's a little bit of trial and error to learn enemy "HP" (Like, I thought the red devils could only be hit when your die is at 5, but they go down at 4, too), but that's a very minor thing -- the game's actual puzzles were very satisfying.
The ghosts were especially interesting enemies to face against; rooms that combined enemies with different movement patterns made the most of this system. Well done.