I like the overall colors and pose of the character, contrasting the primary blue with highlights of yellow.
You could darken the shadows on the figure. I can imagine the character is on a stage with a spotlight on them, and that would create some sharp and dark shadows. You could also bring out more the qualities of the metal body and how reflective the metal is. There are some highlights on the torso, but overall the metal feels matte/flat.
Overall, solid work :)