@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());
    }
  }