DD has been described as a crossover between minesweeper and nethack. It is probably very late in developement for that type of suggestion, but who knows : why not push a little further the comparison, with a level where the walls are replaced with mines, causing a certain amount of damages to the player (a fixed value, or a proportion of health, or anything else). The regular floor tiles would display the number of surrounding mines.
PISSORF'ing monsters on mines would have them to explode causing damages to the monsters (unless they have a special abilitie to avoid the explosion).
You might want to check that game to see how minesweeper can merge with an hack and slash : http://www.zombieminesweeper.com/