Add Game Over screen and count down clock for game time

Assets/Scripts/UI/GamePlayingClockUI.cs

@@ -0,0 +1,19 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.UI;
+
+public class GamePlayingClockUI : MonoBehaviour
+{
+
+    [SerializeField] private Image timerImage;
+
+    private void Update()
+    {
+        if (GameStateManager.Instace.IsGamePlaying())
+        {
+            timerImage.fillAmount = GameStateManager.Instace.GetGamePlayingTimerNomalized();
+        }
+    }
+
+}