If there is an entity called GOD (impersonal) who ...

If there is an entity called GOD (impersonal) who is responsible for this phenomenal universe together with its laws and principles, then He will definitely have complete knowledge of the rules of life. But that automatically does not make God the best player in life. A person, very well-versed with the rules of cricket or football game, does not automatically become a good player. In many cases, he may not even be a player.