Casper the Ghost is on a mission to save the spirit world from the invasion of the evil Kibosh and his henchmen. Players must successfully guide Casper through a series of mysterious and magical levels, including an eccentric medieval castle, a haunted pirate ship, a spooky factory and a madcap amusement park. Using spectacular flying movements and various energy blasts, Casper will rescue his friends, defeat hordes of evil spirits, and finally confront Kibosh himself.