I tried 3 times now and haven't been able to get past the room with the red railing. Your partner mentions that there are "guns" behind the bugs in the previous room but I've never seen anything like that. I've tried grabbing my head through the door of both sides of this air lock but had no luck and I cannot leave this room where I entered from with or without my head.
Great game though, I think having on-screen controls UI would really help, I was in the boss fight for 2 minutes or so before I had to open the start screen to see if there was something I was missing because shooting it without TPS mode wasn't doing anything, and I never had any clue her head had mines until I did it by complete accident.
The 3d health UI in the corner is super cute and I love it :D