Sorry it took so long to come back with anything, forgot to check back on the thread.
Here are some issues with the current version:
http://imgur.com/fcQfw,riZYr,rwWTz#0
In two of the pictures, notice how the ladder has fallen, which did not happen the first time. I would suggest setting it to have static physics to prevent this from happening.
In the third, there is a clear distinction as to where a box light ends, which is generally a big no-no.
The lighting in the first map was decent, I would say work on the light ray billboards in the area just before entering the second map (where you walk down the stairs, there are 2 windows on the left, and the level door is on the right).
Also in the first map, and this may just be me, I notice little white spots at the seams of walls, and this is because you are using a white skybox, which is fine, but I would advise placing black planes outside the walls in all places except for where you look through the windows, or just don't use those kinds of windows.