Thank you for the feedback! I wanted a proper Agatha Christie-style denouement and couldn’t think of a way to give the player agency without ruining the surprises. I think giving away any of Tiabata’s deductions earlier would set off a chain reaction where you could suddenly guess most of it before the finale. But I suppose letting you make guesses during the final scene just before Tiabata reveals something would be a way to go - the non-interactivity of the final monologue has been a frequent complaint.
I wasn’t aware of the Agatha Christie games you mention, I’ll check them out!