The backgrounds and audio convey the Nihei aesthetic to an unsettling extent. The feeling of strangeness and the smallness of the main character are oppressive. Also, I like how the demo doesn't try to explain anything and instead lets the player drink in the environment and speculate.
I really like the weapon. It's very satisfying to shoot and the long cooldown creates an immediate feeling of apprehension on a miss.
Walking is a little exasperating, but maybe it's just a matter of getting used to it. I wish there was a middle ground between walking and running (maybe there is later on?).
I'll definitely be following updates; but I'm both a horror lightweight and a failure at platforming, so maybe I won't be getting the full game, I don't know.