For an admittedly simple map, this is very nice. It's simple in an elegant way. It would be nice to see this in a larger size, but my quick thoughts are that the mountains and colors are very attractive and the general landforms seem fairly realistic--although all the straits are straining my credulity a little. If I were you, I'd drop the number of ocean colors to one or two...the seas seem a little busy given the simplicity of everything else.