Game1.cs

	public class Game1 : Core
	{

		protected override void Initialize()
		{
			base.Initialize();
      
			Input.touch.enableTouchSupport();
      Scene.setDefaultDesignResolution(304, 240, Scene.SceneResolutionPolicy.ShowAll);

			scene = new TestScene();
		}

	}

TestScene.cs

	public class TestScene : Scene
	{
		
		public override void initialize()
		{
			addRenderer(new DefaultRenderer());

			var canvas = createEntity("ui").addComponent(new UICanvas());
			canvas.isFullScreen = false;

			var table = canvas.stage.addElement(new Table());
			table.setFillParent(true);

			table.add(new TextButton("X", TextButtonStyle.create(Color.Black, Color.DarkGray, Color.Gray)))
			     .setMinWidth(30).setMinHeight(30).setAlign(Align.center)
			     .getElement<Button>().onClicked += onClicked;
		}

		private void onClicked(Button obj)
		{
			Debug.log("OnClicked");
		}

	}