The Universe consists of the Imaginary City Streets and the Four Kingdoms sandwiched on top of one another, with the Cathedral of Syndetic Ascension adjoining the two. Gravity pulls objects towards whichever half of the Universe they are closest to, creating a gravity plane directly in the center.
The Universe is much, much wider than it is tall. Though the Four Heroes managed to scale the entire Cathedral of Syndetic Ascension on foot in a short amount of time, it takes energy traveling at the speed of light billions of years to travel along the perpendicular Fan Cord.
Due to an oversight on the part of the creator, Dark Matter Mobster Kingpin was for a time several million times more massive than the Universe.
The universe temporarily shrank due to the effects of Black Hole Mobster Kingpin's gravitational pull, pulling everything to its singularity. The Cathedral of Syndetic Ascension also started to telescope due to the effects from this. The universe was reverted to normal when the black hole was destroyed.