Helloes
Ok, I can tell you guys that he did use a building instruction. I would know since he kinda got inspired from me when talking over skype and showing him my "recounstructions" and then he later on started with the minifigure.
Why he didn't mentioned that in his post, I don't know, maybe he just forgot.
The ID of the minifig lego is 3723.
The arms though, he had to come up with another idea since you cant make moving arms in blockland, and I think they came out very good considering everything.