public void deleteLevel(int ID) {
		if (ID < 0 || ID > 4) {
			if (ChristmasCrashers.isDebugModeEnabled())
				System.err.println("Failed to delete level " + ID + " - invalid level ID (must be between 0 and 4, inclusive).");
			return;
		}
		if (levels[ID] == null) {
			if (ChristmasCrashers.isDebugModeEnabled())
				System.err.println("Failed to delete level " + ID + " - level does not exist.");
			return;
		}
		levels[ID] = null;
	}