The focal certainly needs to be sharpened to bring focus to her face (particularly her eyes in this picture, as they are looking straight forward). Also, moving her between 0.5 and 1 inch to the left or right would make for more interesting composition as those are closer to the power points to which the eyes are naturally drawn. If you have no clue what I'm on about, refer to the rule of thirds, which is applicable to any visual art. I love the use of the contrasting yellow and purple.
The flow is weird. It's going in many different directions. The sig itself looks burned. And you should sharpen it. Make some with less coloring. Use some plain colors and see how it looks.

