Thank you! Sorry about the bugs lol.
The "Random blindness" bug is a tough one to even diagnose let alone fix, for me it usually just fixes itself after a second if I move and swing the camera around a bit. The "Find Oxygen" objective bug was something I just fixed, however the actual HUD doesn't update correctly for whatever reason. So If you look in the objective menu after the HUD displays that objective, that menu will show you what to do next correctly. Not sure why you couldn't equip the wrench though, that's a new one.