You got nice colors for the sky and illuminated the BG properly. What could be improved: In such intense light his figure would be much darker. Look up real life reference in such lighting setting. To add more shadow to the figure you can create extra layer on top, set it to multiply and color it with dark color like dark purple, blue or red. You can adjust opacity of the layer to control how dark it is. Metal is black unless light falls on it. In such setting there would be little light to be reflected from the gold parts. For lineart you could try to color it. Lock lineart layer and color parts of in lighter colors and corresponding to the material, e.g. lineart of blue shirt would get slightly darker blue tone. I added some blur in the background to emphasize movement. Hope it helps. Good luck! | Artwod Feedback