oh cool. i have made up some of my own stuff. one is a person, but it's not as good as yours, an envelop, and i know there are already envelops, but its a new design. also made up a star. your is really good.
there are 2 other deviations in my gallery that teach you how to fold and assemble an origami link of your own. They were removed from my gallery for a bit because i submitted them in the wrong area, but i put them back up
Everyone has their own style, if it was just one piece it wouldn't have all the colors, and I'm sure it would be more enjoyable to fold than a one-piece if diagramed. 13 is one of my lucky numbers too .