"The castle wasn't here before the monster problem and it seems to have difficulty deciding on what time of day it is."- The description of Darklight Castle
Look Closer at Habitat
This location is not like any other locations in the land.
First you start out with a background that indicates nightime, and switches when you go onto another stage, this continues on until the last stage, which is sunset.
There are statue of the a two-headed dragon that might symbolized the Final Boss.
There are also mountain in the background.