Just a couple of little things I spotted. First…
The “6” goes away when you look at the door from a certain angle. (Blast Pit)
First image shows hole in the map, second image shows where it is. (Surface Tension)
I uploaded these images with an uploader site I found called postimage.org, which is actually a really nice uploader, but I’d never heard of it before, so a little unsponsored advertising.