Character design needs to adhere not only to aestetic values but also take in account technical restrictions that govern the animation process. The character, in this case, was meant to be animated with limited resources. That is why the limbs are made like shoestrings or rubberbands. Stretching and bending arms and legs thereby becomes easy and even quite exaggerated movements don’t violate the style.
“...when you look at a photo or realistic drawing of a face, you see it as the face of another. But when you enter the world of the cartoon, you see yourself.”Scott McCloud, Understanding Comics: The Invisible Art
The surrounding environment and props dictates the movement of the character. Scale, height and width of the distorted, caricatured, environment must match the character.