Well for one the background doesn't blend with the render. The placement of the render is very poor. The really looks like you just make a blue background, added a couple of Fractal brushes, smacked the render on the left side and put text on the right. In over all the colors, render position, background is all wrong.
Even though moving visuals can be good to watch trying joining Deviantart, they have plenty of good tutorials for you to improve.