I've given some similar thought to the topic of 'what is a god?' I think you allowed some assumptions overtake your independent mind. Nowhere in the job description of God does it say 'creator'. It does say omnipotent - all powerful, omniscient - all knowing, and omni-present - being everywhere at once. So this God would live in more dimensions than we do, unless it WAS everything, then it could be everywhere all at once, it would float through time like we do, but it is the future and the past and the present of all creation.
So either it IS everything, or it is outside of time. (Sorry about my pickiness, I'm a physicist) If it was everything, then it would know itself perfectly, and know how everything is going to unfold in the future, down to the last photon. Or outside of time it sees/knows everything, down to the last photon.
Ok, so what can it do? It is infallable. Always right in everything, or else it wouldn't be a God, would it? It can't screw up!! If it 'thinks' people are purple, then they are, and always have been and always will be. So every decision was made somewhere in time, and that decision collapsed forward and backward through time to be true at all instances. I wouldn't say it ever 'changes its mind' about anything, it just wouldn't make sense.
I think that's all I remember about my postulation.
Have a good day!