Fun House is a 1991 video game developed by Realtime Associates and published by Hi Tech Expressions. The game is based on the U.S. version of the game show of the same name. The version is completely different than the released version. This version was going to be developed by Mind's Eye Technology and to be platformer but was changed to a basic top-down view for unknown reasons.
The prototype of the unreleased version was found and shared some screenshots by Nolan Brothers on NintendoAge.com.
http://nintendoage.com/forum/messageview.cfm?StartRow=41&catid=5&threadid=86561 The forum thread with showed screenshots from the beta.