The game was cut in half during beta testing. A few cutscenes, backgrounds, and animations that never made it can be seen at one of the artists' web pages.
Christopher Lloyd (Drew Blanc) and Tim Curry (Count Nefarious) appeared in Clue (1985).
When Drew Blank discovers that he's been transformed into a cartoon he begins to scream "I'm a Toon! I'm a Toon! I'M A TOON!!!!" Christopher Lloyd who plays Drew starred in Who Framed Roger Rabbit where his character of Judge Doom was revealed in the climax of that film as being a cartoon.