Added a way from the upgrades to game scene

Assets/Scripts/Game/ReturnToGameButton.cs

@@ -0,0 +1,17 @@
+using UnityEngine.UI;
+using UnityEngine;
+
+namespace Fruitomation.Game
+{
+    public class ReturnToGameButton : MonoBehaviour
+    {
+        private void Awake()
+        {
+            Button b = GetComponent<Button>();
+            b.onClick.AddListener(() =>
+            {
+                SceneController.StartLoadOf("GameScene");
+            });
+        }
+    }
+}