So, in fact, you say I use bad color and my map is too rounded. And the white circles are funny.

In fact the color you see on my own map is not color that i want to use for my final version. It's a draft. They're only here to define the limit of each land (desert, plain, forest, mountain - the red is for the tray... not the best ^^). I want to use some drawing mountain and tree to fill these land. But for plain / desert / toundra / iceland... I want to use some color and some sand dune (or other icons). But I don't find good color. They are only bright.
Thank you for the green color. I start with that and I see what I can do.

For the rounded island, my map is one an half hemisphere so it's very big island. But I try to make more fractal costline.
For the white circle, in fact is blue but I can try without the small island to see if they look better. The island is very small island and rock. nobody live on it.