I like the layout, but the bridges donĀ“t fit your theme. Some texture stretching would be nice too at the bases, but that are just the advanced looks. Moving on top route could be easier in my opinion, espicially in the middle part, I guess I have to try it out to judge better on this.
EDIT: Everything is great, good work on that map, Wraithlike
Nice to see some polyart on the bases, that is really important since simple bases are ... a bit annoying