====== Scroll Notes ======

===== World Coordinates =====

Z-axis values are slightly more rigid than orx to provide additional support for ScrollEd (the level editor embedded in Scroll).

Z-axis is always centered around 0.
ScrollEd uses layers and assumes foreground layers with a Z < 0, gameplay/physics layer with Z = 0, background layers with Z > 0.

===== Object Lifetime =====

Calling StartGame() allows for objects to receive Update() calls until StopGame() is executed.