How about a KM Game done in as point-and-click game for the most part. (Simualr to Monkey Island etc,)
The game can be done in a simular propective to that of which the camaras show you in the TV show.
The game will be played by clicking on the area you want to go, the things you want to say, the stuff in the clue room you want to select.
The spells and items to be used can be selected from either the pause screen or from a small menu at the bottom.
In that menu you can also see your life force, which you need to restore with food or spells.
In certain places like the Corridor of Blades or Block and tackle etc, to goes to 3rd person mode and you need to use the arrow keys to aviod the gaps, blocks or blades etc.
You can create yourself at the start of the quest, like what clothes you are wearing, gender, what helmet of justice you are wearing ect You can also pick what style your life force is, either the face, the walking man, the pie/cake/quiche or a heartbeat thingy.
With Arcengel's Lord Fear modes idea maybe you can have mates play as the dungeonere in the dungeon that you made, with you trying to stop them. So in it as one player mode you got the dungeonere has A.I which can be only be so smart, but a human play would be more of a challange to stop as they can learn how you build your dungeons and think of other ways to get around the problems.
