It you want a neat looking 3d game you have to assemble, go here. It’s only available until the end of october 2008. Just so you know, it is based on the Haunted Mansion at Disney World/Land (the one in Flordia).
[Update 2012-12-26 15:54:08] The domain for the game went down and was throwing errors. It was at http://disneyexperience.com/halloween/