hmm well its a bit simple and it needs a lot more definition like shading n stuff. i think the island needs a sort of irregular shape rather than just an elliptical circle. and you should get rid of the dots in the island and go for some solid colors (the dots just seem out of place). the coconuts were clearly duplicated, you might want to vary those a bit (no two coconuts look the same ) just more detail all around would make it better. keep workin