I have noticed that falling through the map while playing this game is a likely occurrence and others have also ran into this issue. Once you fall, you fall forever and have no way of continuing on in the game other than resetting. My suggestion is for a button to respawn the player without resetting their run in cases where falling through the map happens. Or you could fix the falling through the map, but its probably easier to just add a teleport button....

How to Play The game is played from a first person view and involves walking around and studying your environment while in section 0. Section numbers are displayed above as you enter the corridor. Once you are ready, go to the end of the corridor and enter the airlock to proceed to Section 1. Your goal now is to look for any thing that does not match exactly with what you remember in Section 0. If you see an anomaly (something different from section 0) then you need to head back to the airlock ...

What are the exact steps needed for the "Perfect game" achievement?

The game will be marked unverified until Steam reviews it for steam deck verification. Since we have no way to make this happen, this post is to let anyone know that the game does run on steam deck and fully supports it native on Linux and has full controller support....