For the DLC. you need to press C to crouch and by default it's not bound in the Steam Layout of Keyboar WASD and Mouse

So I bound C button to one of the rear buttons

There are some sticky notes that contain flavor text and altho the game has a command to zoom the view, I found a few of them to be unreadable

Problem with this game is that it uses right trackpad as mouse and... steam joystick stops working even in Steam Menu. So you end up using the trackpad to select options such as Close Game and such

Navigating anything in steamOS after opening this game becomes a mess and it fixes itself after restarting the steamdeck