There's a lot that I absolutely love about this game. There are things I'm not a big fan of as well though.
You totally nailed the feeling and atmosphere. Really felt like I'd just started up Slender.
My biggest complaint would probably be either the sound or the combination of mechanics. The mechanics are really cool but combining them together kinda makes for a bit of a nauseating experience, at least for me. I was so hoping for a big jumpscare type thing when he's close or he gets you but dying is a bit underwhelming too.
I go way more in depth on my thoughts in the video if you're interested. I had fun, thanks for making it!