Its a decent game map. Its good to see the city laid out and the layout clearly.
I think you might find that its a little uniform and 'cartoony'. If you make variations in building shape and land contour it may feel a little more realistic. Mix up the distance between houses and the shapes a bit if you are drawing the _actual_ houses. Areas like the green swath on the west bank look much more satisfying. I think, because the viewer is more ready to accept them as abstract. The more realism the viewer wants the more the map Symbols look too uniform.
Campaign Cartographer is a great program for building and perfecting cities. You may find that some tweaking for realism helps bring up the over all image. There are some great tutorials on the site if you want to vary your style a little bit.
I think Dragon Magazine used CC3 and then punched up the image in Photoshop. Perhaps working in two programs might help.