I wrote this on the train a month or so ago, made a few tweaks to the board and now PDF'd the rules for people to look at and use.
The basic theme is that it's a boardgame where each player is a wizard, with a set pool of "spells", and it's a race to get into the middle of the board and back out again. The maze, however, is constructed as the players go, creating doors and placing blockages as they try to create a path for themselves and block off opponents. Despite this potential complexity it's only a page of rules and should hopefully be simple enough to play - do let me know if you get a chance to try it :)
(http://i.imgur.com/lEWJaU1.png)
DOWNLOAD (PDF) (http://exilian.co.uk/downloads/MagiciansLabyrinth.pdf)