I'd make The Truman Show into a game.
The board would be Truman's little island, and the Truman pawn would go about his daily business (with some randomisation) while you desperately tried to move your actors, sets etc. into the right places before he got there.
If he ever spots anything fishy, his suspicion meter goes up which makes his behaviour more erratic, and you have to distract him with event cards.