added leaderboard

Assets/Code/UI/LeaderboardController.cs

@@ -0,0 +1,43 @@
+using TMPro;
+using UnityEngine;
+using Code.Saves;
+using System.Text;
+using UnityEngine.SceneManagement;
+
+namespace Code.UI
+{
+    public class LeaderboardController : MonoBehaviour
+    {
+        [SerializeField] private TMP_Text leaderboardText;
+
+        private void Start()
+        {
+            DisplayLeaderboard();
+        }
+
+        private void DisplayLeaderboard()
+        {
+            var data = SaveManager.Load();
+            
+            if (data.leaderboard == null || data.leaderboard.Count == 0)
+            {
+                leaderboardText.text = "No records yet!";
+                return;
+            }
+
+            var sb = new StringBuilder();
+            for (var i = 0; i < data.leaderboard.Count; i++)
+            {
+                var entry = data.leaderboard[i];
+                sb.AppendLine($"{i + 1}. {entry.playerName} - {entry.score} coins");
+            }
+
+            leaderboardText.text = sb.ToString();
+        }
+        
+        public void LoadMenu()
+        {
+            SceneManager.LoadScene("MainMenu");
+        }
+    }
+}