The colors are ok, if a little flat, but that goes well with the simplicity of the drawing. However, you made some major anatomy mistakes here. I don't mean the exaggeration (again, given the simplicity of the figure, some exaggeration would be fine), but the fact that the upper part of her body isn't connected to the lower part. Since her torso is turned sideways to the viewer, we shouldn't be able to see her right leg and buttcheek - the only way this view would be possible is if her spine were broken at her pelvis. In fact, if you'd flattened her face a bit, you'd have achieved full-blown cubism.