Hari's scribbles

[The Lost Global Mod]

what you miss the most in this background is, constant and crisp lines which define the structure and forms of your objects/elements in this picture.
for example the mountains or the sand needs 'em.
Otherwise i like the color combustion very much and the sky is beautiful, maybe use more colors for the sun and sunlight on the clouds.
I am not sure to which degree you aim for simplicity, but if you want to go in more detail i would give the mountains more structure, also the sand. Ocean sky are fine in that regard.