void InitializeServices() {
			// Setup Google Play Services Helper
			helper = new GameHelper (this);
			// Set Gravity and View for Popups
			helper.GravityForPopups = (GravityFlags.Bottom | GravityFlags.Center);
			helper.ViewForPopups = FindViewById<View>(Resource.Id.container);
			// Hook up events
			helper.OnSignedIn += (object sender, EventArgs e) => {
				signInLayout.Visibility = ViewStates.Gone;
				controlsLayout.Visibility = ViewStates.Visible;
			};
			helper.OnSignInFailed += (object sender, EventArgs e) => {
				signInLayout.Visibility = ViewStates.Visible;
				controlsLayout.Visibility = ViewStates.Gone;
			};

			helper.Initialize ();
		}