I think the detail is great and I love the almost childrens fairy-tale facial features of the character (reminds me of a face that would be used for "Mr. Sun" or "Mr. Moon" or something), but I think the image could be much stronger with alot more tonal contrast and seperation, especially on the character itself - it's kind of hard to clearly make out his features. Adding shadows and highlights to push and pull some surfaces would bring alot more depth to the character!