Quoted from PinballHelp:
And Ben probably has 20x the depth of skillsets JPop has
Ben could (and it would seem pretty much did) do everything on AMH except setup production. He did the boards, he created the hellevator, he did the dots, he did the code (multiple times), pretty sure he did the art.
Beyond that, Ben has a strong work ethic and doesn't noodle around. If something is working out, he'll figure out another way to attack a problem.