On the existence of God (nothing definitive, just something to think about)

I can throw in something to think about: So God is a creator of everything, he/she/it has come up with everything in the Universe, right? And there is no concrete evidence of this entity here in this Universe he/she/it created. So when you write a book, do the characters in the book know about the writer's existence? Can those characters think they have free will? Do the characters know about their fate being already written? Do the character in the aforementioned book react to things outside of the book, like if you drop a coffee mug on the floor, does the text in the book change to it? The writer is never inside the book, the writer is always external, beyond the universe he/she writes.

When you write a book, you create a world like a god does. You decide where it starts, who the characters are, and what do they know and remember. As the book goes on further the fictional universe expands as the word count accumulates, and the characters gain more depth, experience and knowledge about the fictional world that the character is a part of. How does that differ from your individual life you live right know? You can't trust you memories or knowledge about the birth of the Universe nor the construction of the pyramids. How do you know that you aren't a character in a book? How do you know where the book really started? Is the starting point the most distant memory you remember?

All of that can be written, for example:

"Tim suddenly woke up, he had fallen asleep on the computer, without even realizing it. He read a social media comment that made stupid claims about the nature of the reality; that the reality might be fictional. He has no doubt that the comment made no sense, since he can clearly remember his early childhood, all the lessons of world history and that one time it rained really hard. He even has family photos taken before his birth. Suddenly, out of defiance, he tried to do something unexpected to assure himself that he's in control."

And that character believes all of it, because he really has no choice. He doesn't know that he is fictional, and actively fights against it, because of the knowledge he possesses, which all was written just a minute ago; which I just gave him. I can even give the belief of "free will" to him, personal preferences, random thoughts, which he tries to ignore, but can't.. Though eventually he manages to distract himself so as not to think about it too much. Because I don't think that Tim should have an existential crisis, it's not what that story is about.

So how do you prove anything for or against this?

Anyway it's just something to think about. You receive sensory input, thus you can say you are alive, and that's amazing af whether it's fictional or not..

With regards,
God.