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