Gradient

Gradient is a feature found throughout the game. There is a colour at the top, and another at the bottom. There are two types: Boss fights share the same type of gradient. (e.g. Checkpoint 11)
 * White Is Up Black Is Down (lighter on top, darker on bottom)
 * Black is Up White is Down (darker on top, lighter on bottom)
 * Black is Up White is Down (darker on top, lighter on bottom)