You have a few problems with this map.
First of all, it's hard to read your text. Please keep in mind that some colors are not good to mix, it hurts the eye. Make sure to use some sort of blending option so it's readable.
What I could read I found disturbing. You have several names from popular games in your map, this is not ideal. If I were you I would come up with new, unique, names for it.
Try to find a bump-map for both your land and sea, that was it will look less flat.
Try to blend your colors. Right now it very stiff.
I do like the shape of the continent. With enough effort this could turn out well for you.