for your first battlemap this looks great - yep, as the comments above say - work on seamless textures (in the tuts) and try to blend things more together so they look more natural. But what your map really needs are some drama and depth - and that comes with shadows. Gotta work on those shadows to make stuff POP.
Are you using this in some software driven game or is it supposed to be printed - cause if you print it, you'll probably need a bit higher resolution to make the print sharp. Calculate with 200 dpi - so for every 1 inch square your picture should be 200 pixels wide for a good print (or 150 might do it).