I've put a few hours into the game, and have a few suggestions for the devs:

-So, I read a text/log/document somewhere, and then it disappears from the game world. Where did it go? Logically I would say my character picked it up, but it's nowhere to be foud in inventory. There doesn't necessarily need to be a master journal or anything, but in that case, just leave the texts in the gameworld. It doesn't make sense to remove them, and this way the player can't ever access them again.

-Crouch Toggle - if you're sneaking, this woudl be really helpful. It's awkward to press the movement keys while also holding down the crouch key.

-Jumping would be nice. It's weird to play a first person game where you can't jump. Because most humans have at least some vertical/

-Ability to sheath your weapon. We're trying to be immersive here, right? Most of the game you don't need to be starting at your wrench.

-Checkpoints - I do like manual saves, but it would be nice if there at least a checkpoint save every time you switched levels.

-Maps - it would be nice to be able to see the maps for levels you're not currently on.