Wow, there's a ton of content here! I also made a Lovecraftian game, but your story and art are definitely on another level compared to mine.
Took me over an hour to play through, and I did consult the walkthrough a couple times. The puzzles mostly felt fair, although there were some times where I knew conceptually what I wanted the characters to do, but not quite how to get them to do it UI-wise. The story was definitely unexpected and had a good mix of comedy and compelling mystery. Overall, a great game! Can't give you extra points for creativity, though, since by your own admission it was based on events that actually happened... : )