I can't pin down exactly why but I find this game really nice in a way I don't usually. I think it might be the fact I played the demo a bunch? It's not a feeling you get often now but there's something cool about building a familiarity like that with a game before you play it properly, makes it feel kind of homely which along with the nostalgic-y inspirations makes this really comfy, it's the same as listening to an album's singles before the full thing's out. The muddy, dingey look and claustrophobic environments as well make this feel like something I played on a demo disc when I was 3 that I wasn't allowed to. You could probably say this about quite a few games but the fact this is explicitly a game rather than a horror experience makes it feel more genuine to me. Not finished it yet but really enjoying what I've played :)

edit: (finished it now and ye it's good, it's a lot like Quake for obvious reasons but also the fact that the kind of standard gameplay is held up by really cool vibes)