Looks very nice

Some screenshots...

Red: Add a clip brush somewhere here.

Red: Add two more clip brushes here.

Red: I'd prefer a wall like this to avoid the height change in the corner that doesn't look nice.

Red: All barrels are way too fat. That doesn't look realistic and the top textures are misaligned because of the wrong texture size.

Red: Add one more clip brush below the ladder that people can't jump under it.

Red: The right side (and left down) looks very strange, because the rest of the maps is mapped like the green area.

Red: Move this wood texture a little bit that the dark line of the plank disappears.
Green: This box is misaligned.

Red: Maybe rotating this face like you did on the left side would look more clean, because it's the same structure with a different texture alignment at the moment.

Red: This face is misaligned at the red base.

Red: This faces on the red side of the map are slightly misaligned, too.

Red: The lighting looks very strange here. It would be cool if you can fix the lighting here a little bit to avoid this broken shadows.
Great job so far

Map is online @ [OTB] Beta!