Thanks.
I would definitely like to make a full game out of this, but I'm not sure most people would get/be interested in the idea as a full game. Even then, the mystery wouldn't be able to be that difficult since the mystery just relies on following these rules, so even a full game can't be too long since players would either solve it too soon or the game would just need to hide things more which isn't fun. Good mysteries are ones that you never notice the solution to even though it's staring you in the face the whole time.
I could just make many different levels with entirely different mysteries, but that might repetitive after awhile. I could instead just make my own rules, but then it's just a normal puzzle game with rules attached. Knox's rules describe mystery conventions, so they work as rules because it's using ideas that mystery writers/readers/players deal with normally, only this time backwards.
The best I'd be able to do is make a very small polished game, which wouldn't be worth the effort.
Glad you enjoyed it at least.