Thanks for the in depth feedback!
The reason the game is tagged as horror is more of the fundamental themes of loneliness, mental illness, and hauntings, but it's true there are not any jump scares.
For some of your questions about the story:
***Minor Story Spoilers***
The building across the river is only mentioned if you exhaust all of the dialogue options with the neighbor. It's actually based on a metaphysics institute located in the woods near the ghost town of Windyville Missouri.
https://www.google.com/maps/place/School+of+Metaphysics/@37.702386,-92.8856272,1...
There are all sorts of strange ideas, about that area being a portal or energy vortex. For the purposes of the game, it's left pretty ambiguous.
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Your gameplay suggestions are very useful, and things I hope to add eventually. The game was made for a 30 day gamejam, so there are definitely tons of glitches I still need to fix, but I've kind of taken a breather after submitting. Unfortunately the most glaring of them all (disappearing ground) seems to be a bug in the game engine, so I'll have to wait until a new version comes out to fix it.
Thanks for playing! I can't emphasize enough how useful feedback like this is. I threw the game together fairly quickly, and didn't even really have time for anyone to play-test it before release, so I've noted your comments and will try to incorporate them in a future update.