Basically you use words to destroy the denizens of increasingly dangerous dungeons. You receive a fresh bag of letters after every level and occasionaly receive power-ups and special peices from boss fights. Only a fool would waste an eight letter word on a giant rat...best to save it up for something dangerous. Your health is depleted with every second of play and replenished after a foe is vanquished.
Dungeon Scroll Home Page
This is arguably best Scrabble based D&D system ever developed!