Crowley seems to have control over time. He pauses Mary Loquacious in episode 2 and in episode 3 and episode 6 he stops time all together. We don't see anyone else do that particular trick throughout the entire series. This leads me to believe that Crowley is the only one able to do it, after all wouldn't that be the trick that everyone uses to get out of difficult situations? (Angels and Demons that is) We also know that demons in the Good Omens universe where angels before they fell, therefore Crowley most likely had something to do with the creation of time as he has control over it, Crowley also mentions that he helped create the stars (or at least Alpha Centauri) this leads me to believe that Crowley was VERY high up in heaven to have a hand both in creating time and creating the stars.