God is the "excuse" we give to rationalize things we don't understand. E.g., we used to not understand why the sun rose each morning, so we figured "god" did it (ancient Mayans would sacrifice someone every day to make sure the sun rose). Then we learned about physics and astronomy and no longer associated God with the sun rising each day.

So God is nothing more than what we don't currently understand.

There are potentially living beings out there that are so far beyond our intelligence that we are nothing more than worms to them - in that sense they are gods to us because we can't comprehend the universe on their level, much like worms can't comprehend the universe on our level.

God is all relative.