ACT: Does nothing on it's own but turns into "is" when the rule gets mimicked (e.g. "baba act blue" and "keke mimic baba" makes keke be blue, but not baba)
RELOAD: Reloads the current level, updating KEEP rules. (Acts like "win" in the editor)
RETURN: Returns to the map, updating KEEP rules (Acts like "win" in the editor)
UPDATE: Updates the KEEP rules mid-level when stepped on by a "you" object.
RELOADER and RETURNER both inherently have the RELOAD and RETURN properties respectively