Hey man, Nice work. Really ambitious. A couple comments if I may,
Hype already tackled most of the things that were sticking out to me, but I also felt that the shadows felt off on it. They were too light/sharp. I'd blur out the shadows, and when it's close to the wall, maybe have some shadows along the wall where the robot is near. This would mean you'd have to roughly model all the walls and ground if you haven't already and you could most likely just do it with an AO pass.
The next big thing to me was the green on the robot stuck out too much, I think compared to the plate it's just too saturated, and has that glowing look. It's close, but take cues from that green dumpster and I think it might sit in the scene better.
And I know Hype already said it, but the matchmove NEEDs to be spot on, otherwise it's just falling apart there.
But man, it looks great so far. I can tell a bunch of work already went into this, I'd love to see it go that extra 10%