I plan on making a small murder/mystery campaign sometime. But it'll take a while, as the editor is -really- complicated.
Oh man I would love to play something like that.
When I first really got into DOS, about two months ago, I started thinking about how so many games have you investigate murders/crimes, but never actually let you, the player, solve the mystery. Not really.
Even the Sherlock Holmes adventure games mostly fail in that respect.
Which is where I'm coming from with my idea.
....
I'm also a big fan of the Pet Pal idea (talking to animals! Yay!) and would love to do something where you play as an animal. Maybe I'll merge the two? You play a Duck Detective--investigating a hen who was suspicious murdered in a farmhous kitchen. The suspects: Sally, the cow; Snorri, the sheepdog; Nellie, the cat; and Farmer Sam.