Thas like a... idk honestly! This is a cool puzzle tho, imma go throught some of the other pages and maybe try and find what these look like.

Edit: they don't seem like limbs, atleast out of how you normally draw.

Edit edit: ayo I managed to sew these together:
https://www.newgrounds.com/dump/item/63a85bdd9f548e9312232efd76ed728e
https://www.newgrounds.com/dump/item/3c210bd8c150a2bb52e3e5930225b482
I still don't think I get what this is, this was fun to do tho, thanks mate!