A tight little mystery game, but I'm not sure how I feel about it: I enjoyed the story and the red herrings, but the limited scope combined with the notebook feature made it feel a little constrained. I would not have been able to solve it without the 'write' feature, but that felt a bit like a hint/cheat system, as it gave me the answer.
In a way, these games feel a little bit like a distillation of IF mystery: search all the objects, talk to all the people, and the case is solved. Part of me thinks this would make a better Twine game, as Talk/Ask isn't particularly well implemented, and seems mostly a linear experience. "Talk to" character will accomplish most of what you need.
This is a fine game for a newcomer to IF, but the mystery doesn't unravel in a way that makes me feel particularly clever; the writing is good, but the actual experience of solving and finishing the game feels a bit loose.