it really just depends on if you believe the bible is true or not. but there will always be questions that can't be answered.
can god lie? and if the answer is no, but we can lie, does it make us more powerful than god?
can god create something that he can't destroy?
there are some others that we went over in philosophy of religion that were fun to discuss but there is no answer. but if you are interested in religion discussions and or debates one that i have found that i enjoy is a guy on youtube with the user name telemantros.
Whether you believe in the Bible or not has nothing to do with whether God created everything. lol
We know for certain that someone intelligent created everything. That is a demand of science for everything to be in existence. Let me break it down...
First, we know we exist because we have thought. I think therefore I am. If I did not exist, then I would not be thinking of anything, because it would be impossible. Now, I know this wall in my room exists, because no matter how hard I try, I cannot pass through it. It is a physical barrier with physical properties. So, just as I cannot pass through my wall without breaking it down, I cannot pass through the earth without boring through it or walking around it. Thus, it exists.
If something exists, that means it definitely has a point at which it was created. Otherwise, it appeared out of nowhere, with nothing to create it. And that is just completely illogical. Science has never observed something being created from nothing. Thus, we know the energy and matter of the Big Bang did not come out of nowhere. Someone created it from existing energy. A "creator" of some sort.
Now, some will say, "who created the Creator". Let's follow that logic. Let's say someone did create the Creator. Who created that guy? Another Creator. Let's keep going back with that logic. Eventually, there must be an original Creator whom is eternal in nature, having no beginning and no end - the original source of all things. So, logic still demands that there is an original source of all things which is eternal in nature, having always existed. It is absolutely the only solution to how things can exist. Now, for a Creator to make other Creators is kind of stupid, so I'd say we have one Creator as the origin of all things. He has endless energy, and since matter is made up of tiny energy particles, that means He transferred His energy into creating a physical realm in which we can live. He set the laws in place and ordered everything out into a perfect balance to support life on this planet.
Science has never once observed order coming from Chaos, nor an explosion creating an ordered, functioning system. Science has never seen something come from nothing either. Therefore, to say the Big Bang appeared from nothing, then exploded chaotically and created an ordered galaxy with balanced laws is simply an unscientific, irresponsible, illogical statement.
So, as you can see, it doesn't matter what you believe - scientifically, if something exists, there was someone who created it. There's no way around it.