Welcome to Pixeljoint! In the future, post the image yourself so we don't have to do it for you, please.

 

Also, it's a bit strangely lit. Assuming it's a sphere/ball shape, it should be shaded a bit differently. A quick google image search will find veritable gigabytes of references, I bet. Also, all of your colors are very saturated. Saturation is a measure of how far from grey a color is; bright colors are very saturated, but more subdued tans and greyish ones are less saturated. There's nothing wrong with having high saturation in some places, but it should be used sparingly, for accents or on very light or dark colors that would otherwise be indistinguishable from black or white. If you use high saturation everywhere, you might get complaints about "eye burning" and your art won't look very realistic. Midtones should generally have the least saturation of all the colors in the set of colors for one hue of object (this set is also called a ramp).