This game reminded me of Baby Tree, in a way. Both games are minimalistic with imagery that is means to be anywhere from mildly upsetting to deeply disturbing (depending on your particular phobias).
In this game, a 12-legged box is relentlessly pursuing you. There aren't that many options for directions. As you explore, you find some objects made with ASHII art (which is what I assume the game calls ASCII art, maybe with some modifications).
I got lost a couple of times (in one case not recognizing that something was a room exit), but there's a guidebook. This was written for Neo-Twiny Jam, so it has less than 500 words total.
I think that when going for an unsettling feel, a minimalist, mostly unimplemented game like this can work better than a more polished game. I could see this being the kind of game described in a creepypasta.