Engine Main game Sprite class, added to the Flash Stage.
 Entity Main game Entity class updated by World.
 FP Static catch-all class used to access global properties and functions.
 Graphic Base class for all graphical types that can be drawn by Entity.
 Mask Base class for Entity collision masks.
 Screen Container for the main screen buffer.
 Sfx Sound effect object used to play embedded sounds.
 Tween Base class for all Tween objects, can be added to any Core-extended classes.
 Tweener Updateable Tween container.
 World Updated by Engine, main game container that holds all currently active Entities.