Wow, really great job! When I saw that you used Junji Ito for inspiration I knew I had to play! And you certainly delivered. The atmosphere was spot on. My stomach was all in knots--and I appreciated the Spiral chapter of the Mathematics book. It really took me back to reading Uzumaki by Junji Ito.
You can read more of my thoughts on the game in my blog review here: http://pajamagaming.blogspot.com/2017/02/from-next-door-pc.html