Implemented How To Play Pop up on start

PuzzleGameProject/Assets/Scripts/DungeonSelection/UIManager.cs

@@ -0,0 +1,26 @@
+using System;
+using UnityEngine;
+
+namespace DungeonSelection
+{
+    public class UIManager : MonoBehaviour
+    {
+        [SerializeField] private GameObject rulesPageGO;
+
+        private void OnEnable()
+        {
+            UIEvents.ShowRules += ShowRules;
+        }
+
+        private void OnDisable()
+        {
+            UIEvents.ShowRules -= ShowRules;
+
+        }
+
+        private void ShowRules()
+        {
+            rulesPageGO.SetActive(true);
+        }
+    }
+}