First full playable reached!
Okay, I've got a full game now. I will officially complete the game. Now, it's just a function of fleshing out more interesting things in the mansion as I have more time, getting the itch page ready, and submitting the game.
I'm really pleased with how it turned out! After adding an interface to choose easy/medium/hard difficulty, I just generated a "hard" difficulty mystery and played through an entire game to solve the mystery, and I solved it! It works well, and the mysteries are challenging but do-able as a fun little logic puzzle. It turned out great!