I really liked the mystery and horror idea of your game. The missing children posters, the TV, and the mailman made me curious about what was happening and made me want to explore the different choices. I also liked how some details from earlier in the story connected to things that happened later.
One thing I think could be improved is the clarity of the story. I was a little confused about what was really happening and what the mailman's role was. There were also a few paths that I couldn't fully explore. For example, “Ignore him” wasn't clickable, “Join him” led me to a black screen, and I got stuck while trying different settings with the picture. I think checking these paths and adding a little more explanation or hints would make the story easier to follow.
Overall, I liked the mystery of the game and I think the idea is really interesting. Fixing some of the paths and making a few parts clearer would make it easier to understand and explore the whole story.