Hi, how can I help you? For first you should read the tutorials for riverconstruction. There are something wrong with most of your rivers, first and for all rivers dont split, they unite on their way to the sea and I dont think a lake can have a delta exept weird lakes. And I think the Titlefont is a bit to bold for the map.
Ah, and I love your map! Its a great use for the material I realy like it.
If I can be of any help, ask me.