I tend to gravitate quite a bit towards greens and yellows...so here is one to contrast with that.
Great composition and colors. I love the translucent glow from the sun.
I think it is a nice and creative piece. At first glance I could not see that it was a large robot although I did notice the mechanical hand. I think if you showed a more obvious connection from hand to head or from head to torso. Maybe a ribcage because there is a great blank torso. Also, I understand the purpose of some of the dust clearing up. Good thinking, I also would like that to be more apparent. Usually because after a robot that size falls it picks up lots of dust and immediately warriors raise arms. No one waits until the dust is at a minimum and then celebrate. Good work overall.