Interesting entry, that's for sure.
The castle is immense and interesting to explore. Some rooms are partially hidden by the UI, making them gratifying to discover. Good variety of assets given the timeframe. Also very nice audio; your musical progression reminded me a bit of what you would hear in the most dramatic parts of Frostpunk.
From what I understand, the game plays like a simplified version of Clue. You get one testimony, one proof, and one murder weapon; every suspect is linked to at least two of them, but only one is linked to all three at once. Finding the best way to get all three as fast as possible before someone else dies is the entire point of the game. Is that correct?
It's a bit strange then that the game tries to look like there's way more under the hood than what's required. I feel like you've added a lot of pieces to the game, but not all of them seem to fit together. The concept looks like Clue, but the game itself plays like Among Us. Suspects are wandering about the castle, but none of them are useful to the case. It's possible to skip time, but no point in doing so. The pace is very slow, but the music is intense and dramatic.
You have a pretty solid entry here, but I think it would have been stronger with a tighter focus. Maybe make it so that the link between a guest and a clue is only discovered by talking to them?
Good job to both of you though, very nice result for such a small team.