I plan to keep updating this file and someday make a zine for it....stay tuned.
Regarding your questions.
O2 loss is optional
1.) The items page. Now that I look at it that could be more clear. Let me make some updates
2.) You start in the Airlock, Let me make more clear and update a little
3.) Yes, that was kind of the idea. see below
4.) Currently just flavor, My assumption was you may be able to use these as interesting areas in your game as needed. I want to keep it kinda simple for now, but I plan to add more ideas to this. So if you arrive in the MEDbay you may be able to get some healing, Storage locker you may be able to find a piece of equipment. It is something I plan to expand on. but leave it to you for now to add it to the narrative as you like