Played the demo on the HPS1 demo disc a while back and I was blown away by the production value. Got to say, the full game blows even my heightened expectations out of the water! I absolutely love how you handle the "monsters", each one feels unique and also human, to a degree. Their animations are so good and having them talk to you and give you instructions and going into different states is super fun gameplay.
Also really dig the splashes of surrealism all over the place. I think some games (and other media!) can really overdo it and just make everything "weird", but in this case it was deftly handled. I also liked how the story came together in the end! All in all, one of the best horror games I've played in a while!