Wander aimlessly around Springfield as the one and only Ralph Wiggum.
Play through a campaign of whimsical objectives and nonsensical one-liners.
I'd say more, but it's a game where Ralph is the star and nothing makes sense, it speaks for itself.
(The Mattress mod is not mine, but I just thought it fit well as a placeholder)
If someone did actually want to make Ralph Wiggum: The Game, he'd have his own wacky Ralph-ified vehicle instead.