Actually, God is very simple. You're missing my point by lightyears. You're talking about some kind of pseudo-theological understanding of God.
No I'm not. I'm talking about a scientific explaination of God. I'm not saying that you have to explain why God did anything. I'm saying that you have to explain how God exists in the first place.
Otherwise there's an even simpler explaination than that God did it. Why do things fall downwards? They just do. Why is water wet? It just is.
Things get very simple if you cop out and take an easy route. Occam's razor can't be defeated by the explaination that God did it because first you need to prove that God exists. The only time you're going to make Occam's razor work in favour of God is when you end up with a problem which is so complex that it is actually easier God do it than to have a scientifc explaination. Despite what IDers claim no one has ever spotted a question that hard yet.