Open this up with Quest. Ignore the cardboard box! It was for another question I answered. =)
Just 'feel walls' and go 'out'. When you go north from the first room, it'll loop you back to the starting room. You can use this 'dead end' room for all dead end exits in your maze. Warning: I have not tested it with the map function. If you have a large map, it might appear that you jump to the dead end room and back to your current room. If so, you can probably tinker with the room script and put the scripts in the before entering room space. That way, the player never goes into the dead end room.
Let me know if you have questions!