public MainMenuScreen(AsteroidShooterGame _game) {
    this.game = _game;

    camera = new OrthographicCamera();
    camera.setToOrtho(false, AsteroidShooter.V_WIDTH, AsteroidShooter.V_HEIGHT);

    batch = game.getSpriteBatch();
    font = new BitmapFont();
  }
  @Override
  public void render(float deltaTime) {
    Gdx.gl.glClearColor(0, 0, 0, 1);
    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

    camera.update();
    batch.setProjectionMatrix(camera.combined);

    batch.begin();
    font.draw(batch, "Welcome to RGBAsteroids!", 100, 150);
    batch.end();

    if (Gdx.input.isTouched()) {
      game.setScreen(new AsteroidShooter());
    }
  }