Chaos Angel takes place in some ruins in the sky. In appearance, it is very similar to a temple or an altar with indoor and outdoor areas. In the background outside, a moon and a large thunder head can be seen. The interior of the ruins feature multiple pillars and what appear to be Egyptian hieroglyphics which are written on the walls, and are lit by lanterns.
Acts 1 and 2 are structured in that the player will go inside the ruins and overcome hazards such as falling boulders and chambers with crushing walls, and gimmicks such as spinning platforms that move when the player runs on them, much like metal nuts. The Seesaws from Route 99 and the crouching catapult from Twinkle Snow return, along with a sideways variant of the latter that the player must push. The outdoor areas are generally more sparse in terrain than the indoor areas and thus are rife wit bottomless pits.
Chaos Angel Act 3 takes place almost entirely outdoors on floating platforms that the player must ride across a colossal bottomless pit. Falling off is not the only danger, as there are many spike traps, boulders and Buzzers that can potentially knock the player off the platform to their doom, and a section where the platform moves up and the player must avoid being crushed into the ceilings.
Even though Altar Emerald is labeled as a different zone, it can only be accessed via Chaos Angel's Zone Map.
↑Judging by the change in scenery in Altar Emerald at the end of the game, which is situated in the same location.