Well, it would be simply remiss of me if I didn't share the appreciation right back -- not only for seeing how much you enjoyed the work but that you took the time to write this feedback! Thanks so much for playing. It's things like this that really have an impact and make a person want to create more, so it's really appreciated.
I see your point on the second murder. Admittedly, my thought process for solving the mystery relied on the player recognizing the nature of the mechanism didn't really matter that much, but I can see how it might've been a leap in assumption. When it comes to this things, it's always difficult to gauge what a person's thought process may be, and my own has years of experience in the ways Umineko gameboards are constructed, so what I think a player might reach may not be the same for everyone.
Again, thanks so much for taking the time to write this!