It's a good effort, particualrly the face. The metallics could use more shading, and I think you need a bit thinner paint and more layers of it so as to make it smooth enough (that's why the yellow looks blurry I think).
Keep painting!
(5.5) I think you did a nice job on the face, the lips could maybe be just a touch darker. Excellent choice of hair colour for a natural looking blonde. You might have more luck shading yellow with brown. Yellow is a hard colour. Some of the lining on the gray looks a little messy, cleaning that up helps presentation a lot. The overall look of the base is good, but I'd have gone with a different colour - either a browny gray for natural rocks or something like a red brick for rubble, and then maybe brown for the dirt parts. The gray blends in too much with the gray used on the figure, the overall composition needs another colour or two I think.