Wow, pretty nice wallpaper, all elements are integrated well in the background and in the next planes, i can see just two elements that look a bit strange, the contrast between Konata and the bottom planes is to high, maybe if you turn Konata a little more to the white, just 5 o 10% more light in that layer to make Konata colors more soft, i think this could make a perfect wallpaper integrating Konata with all other elements. The other strange element are the credits, but i think is understandable to put them in red, although i prefer them in another color with less contrast with the wallpaper.
Just those 2 observations; you done a great wallpaper and the time you has spend on it is notorious,