Talk about a movie that works because of casting...
This film only works so well because of the casting of George Burns and John Denver. Burns was so likable, funny and non-threatening that very few could be offended at his playing God. And John Denver was so average but seemingly nice that he was the perfect everyman and the kind of guy who could make it believable God would choose him for His message. I read the original idea was God played by Mel Brooks. That would have been a very different film and wouldn't have worked half as well. Even now, no one has appeared to take George Burns place, an 80 and 90 something year old movie star. He was one of a kind.
Open the door for Mr. Muckle!!