God?

Throughout Good Omens, the book focuses on a number of different characters,but most notably Crowley and Aziraphael. They are supposed to represent good and evil. One thing I noticed throughout the book is that God never makes an appearance. Satan's presence is lacking too, but he at least sort of appears every time Crowley is being scorned for something. However, that is masked behind the voice of Freddie Mercury in a number of different Queen songs.

"THAT IS WHAT WE ARE DOING, CROWLEY, AND IF IT GOES WRONG, THEN THOSE INVOLVED WITH SUFFER GREATLY. EVEN YOU, CROWLEY, ESPECIALLY YOU."
(Good Omens, page 22).

Does this means that Crowley and Aziraphael are supposed to represent God and Satan in Paradise lost? If Good Omens is supposed to be a reference to that book, why arn't the key characters represented more closely? Crowley and Aziraphael posses characteristic elements of both sides, and there is no distinct line between good and evil between them like there is in Paradise Lost. The war that is supposed to be taking place is also sort of muffled in the background, where in Paradise Lost there was a whole book on it.

But what about God? The only reference I saw towards him in Good Omens was when Sable recieves a scale in a package. In Paradise Lost God put the scales in the sky in order to show Satan a sign. The package Sable recieved may have also been a sign, but other than that i see the forces of so called "evil" much more prevelent in Good Omens.