Depends on what came first, doesn't it? Satans fall or free will of humans. Humans didn't really get to exercise their socalled free will until put in Eden... with that tree with forbidden fruits no less. God can not claim good faith on that one, as it was bound to happen eventually. Otherwise, why would the tree have been there in the first place. Makes about as much sense as trying to talk a kitten out of chasing a ball of yarn. Just imagine if Adam and Eve had lived happily ever after and died from old age without any offspring. So much for the masterplan.
Edit: Regarding the Platypus, what else to do with all the spare bits from creation?