Okay, this was entirely accidental....and you don't really see it until he flips right way up....
But it works, dammit! http://FantasticContraption.com/?designId=84077
And yes, he starts off upside-down seeing as the orange ball is supposed to be his head....and he has motors where his hands and feet should be.
Still....Now I'm off to see how many other levels Robot Man can beat.