Played this throughout several hours and I really enjoyed it! I had to keep constant notes and ended up trial-and-erroring my way through some of it, especially getting started, but once I got into the swing of things it was super enjoyable. It was pretty disturbing and chilling, always a great thing in mystery games like this.
Leaves plenty of unanswered questions, and I definitely had to cheat to get the hidden stuff (shout out to all the comments here), but still a great experience all around. Re-reading through it all with the new context is super interesting, too, and really shows how well this was thought out!