Thanks for the feedback guys. Ascension, Gidde, as per your advice I have darkened both the forests and the oceans a bit, whilst simultaneously lightening up some of the darker spots within the land. I've also tried to blend the rivers into the oceans, so as to make for a smooth transition. It might be a day or two before I'm able to add city, town and topographical names. Here are the two versions compared side by side: