The game revolves around the three hitchhiker ghosts freeing all 999 ghosts and five grooms from the clutches from the Black Widow Bride. I suppose it's a basic walk through level type of game and gamers who are much more action oriented will probably tire of the game quickly.
The games greatest strength is that all of the game's animation is based on the artwork Shag did for Haunted Mansion's 40th anniversary. I shall do a post in the future dedicated to the awesomeness that is Shag.
The game tries to keep things a little bit more interesting by adding certain tasks to each level. Here you can see one of the Hitchhiker ghosts putting together the Haunted Mansion's iconic portraits.
Proof I finished. You can play the game by clicking on the link below.
For those of you who haven't heard Guillermo del Toro is in charge of a new Haunted Mansion film. It's supposed to revolve around the hat box ghost. If the movie does good it will probably mean that Disney will finally put him on the ride.