Добавил кнопки для управления временем

Assets/Scripts/UI/TimeControlMenu.cs

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+using UnityEngine;
+using UnityEngine.UI;
+
+public class TimeControlMenu : MonoBehaviour
+{
+    [SerializeField] private Button _pauseBtn;
+    [SerializeField] private Button _resumeBtn;
+    [SerializeField] private Button _2xBtn;
+
+    private void Start()
+    {
+        _pauseBtn.onClick.AddListener(SwitchPause);
+        _resumeBtn.onClick.AddListener(() => Time.timeScale = 1f);
+        _2xBtn.onClick.AddListener(() => Time.timeScale = 2f);
+    }
+
+    public static void SwitchPause()
+    {
+        Time.timeScale = Time.timeScale > 0f ? 0f : 1f;
+    }
+}

Assets/Scripts/UI/TimeControlMenu.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 078c659d31556e94687a93d8cf5919d2