The 2MinuteDungeon was fun, and worked out well, so I'm refining the process here and giving us all a little more time to think.
I've also thrown together a slightly more suggestive dungeon with rooms in a more intuitive order--1 is the entrance, 2 is the next room, et cetera.
-Get something to write with/on
-Click to enlarge the dungeon
-Set the clock for 3 minutes. (Thanks for that, TheCramp.)
-Try to write something down for all 16 rooms.
Speed tips: Don't number them til you're done. Don't spellcheck or capitalize 'til you're done.