Quoted from solarvalue:

See my post above for one way to integrate the mode which makes thematic sense.
Picture this:
You have an image on the DMD of bubble-gum girl with her mobile phone. Zoom in to the phone while the other members of the team are calling out "Hey, quit messing around", etc. Then, image of the game starting up "Flippy Ghost, player 1", bubble-gum girl proceeds to play the game while the others heckle her. When she loses the game she could complain "You distracted me!" or if the player skips the mode she could say "Hey, what did you do that for?" while one of the other team members says "I hate video!"
So the player isn't the ghost, the player is bubble-gum girl playing a game with a ghost in it on her mobile phone.