Really cool idea! The artstyle and aesthetics were great, and being able to look out the window added a nice layer of creepiness to it. I also liked the concept behind looking through the letters, but with the exception of the UV light, I had a REALLY hard time finding out what letters had hidden messages and which ones were safe. Going through line by line was really tedious and I wasn't quite sure what I was looking for with the lining up the two pages. Maybe I'm just bad at this kind of thing, but I swear I was not finding any messages by lining up the two pages. Regardless, really cool game!