public static void addWorld(World world) {
		if (world == null) {
			if (ChristmasCrashers.isDebugModeEnabled())
				System.err.println("Failed to add world - null World object provided.");
			return;
		}
		if (world.getID() < 0 || world.getID() > 4) {
			if (ChristmasCrashers.isDebugModeEnabled())
				System.err.println("Failed to add world " + world.getID() + " - invalid world ID (must be between 0 and 4, inclusive).");
			return;
		}
		if (worlds[world.getID()] != null) {
			if (ChristmasCrashers.isDebugModeEnabled())
				System.out.println("[Warning] Overwriting world " + world.getID() + ".");
		}
		worlds[world.getID()] = world;
		world.load();
	}