added speed change and death

Assets/Code/UI/GameplayController.cs

@@ -1,5 +1,8 @@
 using TMPro;
 using UnityEngine;
+using UnityEngine.SceneManagement;
+using UnityEngine.UI;
+using PrimeTween;
 
 namespace Code.UI
 {
@@ -8,11 +11,32 @@ namespace Code.UI
         public static GameplayController Instance;
 
         [SerializeField] private TMP_Text coinsText;
+        [SerializeField] private CanvasGroup deathPanelCanvasGroup;
+        [SerializeField] private RectTransform deathPanelWindow;
+        [SerializeField] private TMP_Text finalResultText;
+        [SerializeField] private TMP_InputField nameInputField;
+        [SerializeField] private Button restartButton;
+        [SerializeField] private Button exitButton;
+
         private int _coins;
 
-        private void Awake()
+        private void Awake() => Instance = this;
+
+        private void Start()
         {
-            Instance = this;
+            Time.timeScale = 1;
+
+            if (deathPanelCanvasGroup != null)
+            {
+                deathPanelCanvasGroup.gameObject.SetActive(false);
+                deathPanelCanvasGroup.alpha = 0;
+            }
+
+            var player = GameObject.FindGameObjectWithTag("Player")?.GetComponent<Gameplay.Player.PlayerController>();
+            if (player != null) player.OnPlayerDeath += ShowDeathScreen;
+            
+            restartButton.onClick.AddListener(RestartGame);
+            exitButton.onClick.AddListener(ExitGame);
         }
 
         public void AddCoin()
@@ -20,5 +44,51 @@ namespace Code.UI
             _coins++;
             coinsText.text = $"{_coins} Coins";
         }
+
+        private void ShowDeathScreen()
+        {
+            deathPanelCanvasGroup.gameObject.SetActive(true);
+
+            Tween.Alpha(deathPanelCanvasGroup, startValue: 0f, endValue: 1f, duration: 0.5f, ease: Ease.OutSine, useUnscaledTime: true);
+
+            deathPanelWindow.localScale = Vector3.zero;
+            Tween.Scale(deathPanelWindow, endValue: 1f, duration: 0.6f, ease: Ease.OutBack, useUnscaledTime: true)
+                .OnComplete(() => {
+                    Time.timeScale = 0; 
+                });
+
+            finalResultText.text = $"You collected: {_coins} coins";
+        }
+
+        private void RestartGame()
+        {
+            SaveScore();
+            Time.timeScale = 1;
+            SceneManager.LoadScene(SceneManager.GetActiveScene().name);
+        }
+
+        private void ExitGame()
+        {
+            SaveScore();
+            Time.timeScale = 1;
+            SceneManager.LoadScene("MainMenu");
+        }
+
+        private void SaveScore()
+        {
+            var playerName = nameInputField.text;
+            if (string.IsNullOrEmpty(playerName))
+                playerName = "Player";
+            Debug.Log($"Saved: {playerName} - {_coins}");
+        }
+
+        private void OnDestroy()
+        {
+            restartButton.onClick.RemoveAllListeners();
+            exitButton.onClick.RemoveAllListeners();
+
+            var player = GameObject.FindGameObjectWithTag("Player")?.GetComponent<Gameplay.Player.PlayerController>();
+            if (player != null) player.OnPlayerDeath -= ShowDeathScreen;
+        }
     }
 }