From Rock, Paper, Shotgun today:
If you are reading this now, you could instead be making your own dungeon crawler. That’s the magic of DungeonScript, a fairly simple browser-based game-making tool intended for first-person dungeon crawlers. After a little studying, you could be making your own dungeon crawlers and sharing them online for us all to play.
Looks pretty cool -- I'd love to see someone here make something..