public void changeCurrentLevel(String levelName) {
        timer.stop();

        //imageLoader.reset();

        if (currentLevel != null)
            currentLevel.clean();

        changingLevel = true;

        if (levelName.equals("Menu"))
            currentLevel = new MenuLevel(this);
        else if (levelName.equals("MainLevel"))
            currentLevel = new MainLevel(this);
        else if (levelName.equals("HowToPlay"))
            currentLevel = new HowToPlayLevel(this);
        else {
            log.d("Change Level Failed. Bad level name.");
            return;
        }

        currentLevel.loadData();

        timer.start();
    }