Wow, this is incredible work considering the time-frame!
I very rarely play ttrpg, but the setting is very compelling, and it looks like you created numerous and in-depth resources for the Puppet Master. As a reader, I especially enjoyed the gradual realisation that the guide is an unreliable narrator, maybe even the actual puppeteer, it fits the theme so well!
Horror is so not my cup of tea, but I'm still kind of curious to try and play it ^^