MainMenu.java

public class MainMenu implements Screen{

    private Game game;
    private Stage stage;
    private Table table;
    private Skin skin;
    private TextureAtlas atlas;
    private TextButton playButton;
    private BitmapFont white;
    private Label heading;
    private Label.LabelStyle headingStyle;

    public MainMenu(Game gam){
        game = gam;

        stage = new Stage();

        Gdx.input.setInputProcessor(stage);

        white = new BitmapFont(Gdx.files.internal("fonts/white.fnt"), false);

        atlas = new TextureAtlas("ui/button.pack");

        skin = new Skin(atlas);

        table = new Table(skin);
        table.setFillParent(true);

        TextButton.TextButtonStyle buttonStyle = new TextButton.TextButtonStyle();
        buttonStyle.up = skin.getDrawable("buttonUp");
        buttonStyle.down = skin.getDrawable("buttonDown");
        buttonStyle.pressedOffsetX = 1;
        buttonStyle.pressedOffsetY = -1;
        buttonStyle.font = white;
        buttonStyle.fontColor = Color.BLACK;

        playButton = new TextButton("PLAY", buttonStyle);
        playButton.pad(30);
        playButton.addListener(new ChangeListener() {
            @Override
            public void changed(ChangeEvent event, Actor actor) {
                game.setScreen(new GamePlay());
            }
        });

        headingStyle = new Label.LabelStyle(white, Color.WHITE);
        heading = new Label(GAMETITLE, headingStyle);
        heading.setFontScale(1);


        table.add(heading);
        table.getCell(heading).spaceBottom(100);
        table.row();
        table.add(playButton);
        table.debug();
        stage.addActor(table);

    }

    @Override
    public void render(float delta) {
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

        table.act(delta);
        stage.draw();

    }

    @Override
    public void dispose() {
        stage.dispose();
        atlas.dispose();
        skin.dispose();
        white.dispose();
    }

    @Override
    public void show() {

    }

    @Override
    public void resize(int width, int height) {

    }

    @Override
    public void pause() {

    }

    @Override
    public void resume() {

    }

    @Override
    public void hide() {

    }
}