I want to say this game is a neat concept, but I seriously think something is broken. I've gone through it at least 12 times now, and on each and every single run it ends with exactly 4 missing.
Because I thought I was just bad at spotting changes, I took screenshots of the game when it first started, and alt-tabbed to them to spot differences immediately, and as I thought nothing changes except for what I listed above. This was a last resort, though.
I'd also like to note that the warning sound is extremely startling since the game has no ambience, so the sound ends up being loud and sudden.
Also, please make it so that the report menu automatically changes to the room you're actively in.