"Having had no map building skills before now I have had to learn from tutorials, forums and general experimentation with the Hammer map building tools that come with Half Life 2."
-You poor thing, having to learn how to map like everyone else
Anyways, map looks nice - maybe a bit too "boxy" -square and plain.
Maybe add some decals, more props.
And I dont really understand the layout of the mall - the one big room with little box stores within. Never seen a mall like that.
I also don't understand the purpose of the giant crates in the courtyard, and is that a trainstation I see? (the pic with the horse)