Game.kt

    override fun create(): Unit {
        batch = SpriteBatch()
        var viewport = FitViewport(600f, 800f, OrthographicCamera())
        stage = Stage(viewport)

        Textures.set("logo", TextureRegion(Texture("badlogic.jpg")))

        stage.addActor(TestActor())
    }

    override fun resize(width: Int, height: Int) {
        super.resize(width, height)
        stage.getViewport()!!.update(width, height, false)
    }

    override fun render(): Unit {
        stage.act()

        Gdx.gl!!.glClear(GL20.GL_COLOR_BUFFER_BIT);
        super.render()
        stage.draw()
    }