Incredible picture overall, but man, how did you manage such a buttery-smooth lightbulb outline? Seriously, it's really flush!
@dexrunner: sorry for the late reply! I rarely add colours just for antialiasing, so they were there already. One neat strategy is for all the colour ranges to share the darker colours (so you sort of have a shared colour of darkness). This saves colours but also makes sure your image is consistent
Superb. Great character development and fantastic perspective work.
Wow! I like the boxy style it looks good. But why is the robot mech thingy looks like a console? Or is it just my imagination. Anyway, great piece. 
Super nice! I have a question, though. For the AA next to the bulb/head, were the AA colors decided based on the color of the bulb mixed with the background? Or were they already part of your palette before you got to that part?
@.vectorwing thanks! :) Antialias is all about practice, imo. WIth some shapes (like on the lightbulb) it helps to look at diagonal rows of pixels, if that makes sense