For important, even essential background reading on this question, see Dr. Jaco Gericke's chapter 5, "Can God Exist if Yahweh Doesn't", in The End of Christianity. The paperback is $4.29. There's no excuse for not getting it now! There is no objective evidence for a creator, much less for identifying Yahweh as the creator.
What evidence do you have that Yahweh is the Creator God? -- Gary M
Believers ought to honestly re-examine what they falsely believe is evidence for creation by their sect-specific god. For instance, the god of the gaps reasoning is not evidence of anything, except that there is a gap in our understanding. Just because scientists discover a mystery in the natural world doesn't mean believers get to substitute a bigger mystery, a non-natural spiritual one without objective evidence for it--their own sect-specific god. Never forget it was science that discovered these mysteries, not religion, and that science is the only path to travel if we hope to solve them. Science, not religion, has had an overwhelming track record, one that allows me to say it's the only way to know the nature of nature, its workings and its origins.
Also important, even essential background reading on Gary M's question--the best of the best on the topic of prayer--is Dr. Valerie Tarico's chapter 14, "If Prayer Fails, Why Do People Keep At It?" in Christianity in the Light of Science: Critically Examining the World's Largest Religion. There is no objective evidence for answered petitionary prayers, much less for identifying Yahweh as the deity who answers the prayers of all the believers in the world.
Since there's no objective evidence for answered prayers, as Tarico shows, why would anyone claim there's evidence that Yahweh created the universe (or any deity for that matter)? Wouldn't objective evidence for answered prayers be available if there's a god who expects us to believe s/he created the universe? If there's a god who doesn't provide objective evidence for answered prayers, which can be scientifically tested in real time a multiple number of times, how can s/he expect us to believe s/he created the universe without this present-day objective evidence? Why are we expected to believe in creation as a unique event in the far far distant past, one that science doesn't have much access to and might not be able verify due to it's very nature, without any objective evidence for answered prayers?
Makes sense of an omniscient god right? This makes the guy who shot himself in the foot out to be a smart person! The centuries old news is that an omniscient prayer-answering creator god does not exist. Neither does Yahweh. Never did.