Implemented chest pop up and gaining ability upon completing a room with a chest reward.

PuzzleGameProject/Assets/Scripts/UIManager.cs

@@ -0,0 +1,17 @@
+using System;
+using UnityEngine;
+
+public class UIManager : MonoBehaviour
+{
+    [SerializeField] private GameObject canvas;
+    [SerializeField] private GameObject chestRewardSelectionUI;
+    private void OnEnable()
+    {
+        RoomReward.ChestRewarded += HandleChestRewarded;
+    }
+
+    private void HandleChestRewarded()
+    {
+        Instantiate(chestRewardSelectionUI, canvas.transform);
+    }
+}