So this isn't really a creation story, but I've been trying to toss in various approaches and explanations of human existence:
The Buddha has said regarding the origin of life that such things are unconjecturable and would bring madness and vexation to anyone who conjectures about it. When asked why he did not explain the origin of the world, the Buddha replied that it did not contribute to the goal of enlightenment and was not fundamental to the holy life. They do not lead to disenchantment, dispassion, calming, direct knowledge, self-awakening, Unbinding.
The Buddha also dismissed such questions in the parable of the poison arrow: a man is shot with a poison arrow, but before the doctor pulls it out, he wants to know who shot it (arguing the existence of God), where the arrow came from (where the universe and/or God came from) why that person shot it (why God created the universe), etc. If the man keeps asking these questions before the arrow is pulled out, the Buddha reasoned, he will die before he gets the answers.