This is a tough pick! It's a toss up for me between Epic Yarn and Crafted World. Epic Yarn was just so inventive and interesting at the time of its release, there really weren't a whole lot of similar games, so the idea of a platformer entirely made of materials like that while actually including the concepts from it within the level design was pretty awesome. It also had masterfully designed stages. Crafted World I felt a similar sort of magic while playing, they do so much with the level design.
Woolly World was pretty mediocre imo so I wouldn't really factor it in.