I loved it. I really did and excited to play the full game.
I've been really into the backrooms, particularly Kane Pixel's interpretation of it and The Stanley Parable. This filled that void for me.
I think in terms of what I'd be looking for in the full game, maybe a walk button? Also the tipsy turvy walking motion with the constant walking sound effect threw me off a bit. But other than that everything was amazing. Voice acting, ambient sounds, atmosphere, the music in different areas, visually it was amazing too. I really dug it. I KINDA want a backrooms level, but I understand if that's not the vibe. I'd fully buy a backrooms DLC though.