Добавил подсказку

Assets/Scripts/TooltipArrow.cs

@@ -0,0 +1,21 @@
+using UnityEngine;
+
+public class TooltipArrow : MonoBehaviour
+{
+    [SerializeField] private GameManager _gameManager;
+
+    private void OnEnable()
+    {
+        _gameManager.OnStateChanged += OnStateChanged;
+    }
+    private void OnDisable()
+    {
+     _gameManager.OnStateChanged -= OnStateChanged;   
+    }
+
+    private void OnStateChanged(GameManager.GameState newState)
+    {
+        if (newState != GameManager.GameState.BuildingPath)
+            gameObject.SetActive(false);
+    }
+}

Assets/Scripts/TooltipArrow.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: a22ad30df8d48064cb913f561844a492