In its simplest terms, ADN is a social network like Twitter or Facebook that invertsthe prevailing business models of those (and virtually all existing) social networks.
Written by von Trier, it inverts and upends the traditional idea of a teacher inspiring his student, and its effect upon the rest of the film is revelatory.
"Luigi's Ghost Mansion: Haunting Hijinks" takes that idea and cleverly inverts it: The GamePad player becomes the pursuer a ghost trying to sneak up on Wii Remote players who carry ghost-detecting flashlights.