Hmm...The whole map doesn't make it imho. My comments:

A lack of harmony with textures ( textures used for sea and terrain don't fit the style of the town), blue of sea is too "blue" and the town looks rather like some brain parts or bunch of rivers than town parts. The bridges and harbour parts doesn't look natural too. Sorry for the kind of rude comments but well you need to work more about it to make it "true" (whatever style you choose).