The chin needs to be rounder and bigger, the lining needs to be darker (I can barely see it) The coloring is too light, try a darker shade. Her eyes are too large, make them a little smaller and smooth the lines with the soft erasure. The words are a distraction over her head, try putting them below her, and use the font (letter) tool. It'll look much better. And try some shading and highlights in her hair, this would look so much better. You have more than enough space, please go back and work a little more on this icon. You'll see a world of difference. This isn't critique, just artistic tips. Welcome