I feel like this is the type of game to hide a bunch of secrets. I am not certain yet whether I found them all yet, but judging from your previous projects. I have a hunch there are probably a lot of things tucked in real nicely in this project.
When I stumbled across a hidden dev log I was like... WOAH, and then spent the next few minutes trying random things to find other secrets. Unfortunately I don't think I found too much.
I know there is a cracked wall in the first room of the library when you use Panther eyes, but I could not find out how to get past the cracked wall.
Anyways, I find this genre of "use items in unique ways to find things in the world" games to be quite interesting. The panther and stop watch item have a lot of puzzle creation potential as they are just cool concepts for abilities. I just wish I could find more things. For instance, I found the secret blue enemy that was actually the voice behind the tablet, but don't know if there is something you can do with him.
Beyond that, the presentation in the intro was interesting. I think my main thing is that I just wish the plots in the books were a little bit more integrated with whatever my personal character's motivations/story is. They seem like very separate stories without too much connection.
I also wish there were more things hidden through the God Eyes and Stopwatch item as I found them to be really interesting ideas as a gameplay mechanic. The chicken puzzle also was a moment where I felt clever when I figured out the puzzle.