Incredible game. There's so much good stuff here, with all the systems for picking stuff up and placing things. This was really well thought out and at first I was like there's too much stuff to go through but I kept combing through as I started making connections it was really cool. The props are really nice, good font choices, really great usage of different styles of paper and the materials look so good. I liked the random phone calls and the ability to skip text typing out during conversations. There's so much good and I think everyone will talk all about them so I won't hammer on them too much. Instead I'll give you an idea of what could be good improvements:
When activating the desk all the notes/pictures were upside down, it would be nice to either rotate things in the orientation you are standing when you set it down, or have them orient automatically to the side the desk is activatable from. I really liked the ability to pin stuff to the board, it would have been nice to have the ability to write my own notes within the game and stick them up there. There are some typos here and there, nothing too crazy I think I maybe counted 3, but at the same time those typos could be from the characters. I think the hitbox for the phone could be better, like a box around it so you don't have to be so perfectly aimed at the receiver. I think it would have been cool to add in the actual usage of the rotary phone instead of just pressing buttons but I could see why you might leave that bit of polish out. I think the picking up and putting stuff down was pretty satisfying but when placing stuff it was really easy to get them floating in funny ways, not a huge issue at all but just kind of funny. Being able to move the mouse around while inspect to either turn pages over or pan around the pages would have been cool, and you could have hidden interesting details on the backs of stuff that way, or even had it as a note surface where you could type your own notes on them. The chairs and boxes kinda got in the way when walking around the office but I supposed that's a little realistic, but maybe being able to move through them would have been fine for this. The last thing was when carrying objects around they were a little jittery while moving, not game breaking at all but maybe could be solved through a different style of parenting or using a different update loop (physics process vs process), I dunno.
Great work overall on this, it feels really complete and polished.