This game has an aesthetics very strongly evocative of Stalker, from the player character's fatigues to the ambience, the old-school graphics techniques, and the drab colour pallette enhanced with dithering. Nice job on that.
The enemies are pretty interesting but I kept getting into spots where I was quite helpless. The entities appeared to move when I used the scanner but I managed to hack around that by rapidly tappping the right mouse button. I think if that was a little more strict the entities would have been much more challenging.
Otherwise, I personally find the entities really intruiging.
Having the text cover some narative at the start tutorial, between levels, and at the end made sense, but I felt like they interrupted the tension sometimes during the gameplay. Level 2 would be a good example... you introduce the entity through its unnatural noises, and then you see it on a cliff. When you try scanning it, it starts moving towards you. Super cool, but I found that the text popping in and explaining what I was already about to uncover really impeded the uneasy sense of discovery I was feeling. It felt like you were telling before showing, and I would have liked it more if I wasn't told... just left to figure it out and be surprised at how it behaves :)
With the shader effect you do with the scanner I can't quite tell whether it is from the camera perspective or the character perspective and it threw me off occasionally, but it looks frigging cool and I like the mechanic.
This is a really neat concept overall, I'm glad I saw you sharing it in the discord server.