Is the concept of God an alternative to two other possibilities explaining all reality?

I would not say that there are only three explanations of reality as a whole. Further, I don't think it's possible to quantify nothingness into an infinity. The concept of infinite physical substance and the concept of God do seem to work well as explanations of all reality, but God as mover would be only a partial explanation. A pantheistic God would be a complete explanation. Why? Because God as mover means that there is God and there is the world which is not God that God moves. Thus God as mover is only a partial explanation.