infinite trees!!!

Game/Assets/Prefabs/Tree.prefab

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Game/Assets/Scenes/MainScene.unity

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Game/Assets/Scripts/TreeSpawner.cs

@@ -3,12 +3,22 @@ using UnityEngine;
 public class TreeSpawner : MonoBehaviour
 {
     public GameObject treePrefab;
-    public Transform spawnPoint;
+    public Transform player;
 
-    private void OnTriggerEnter2D(Collider2D other)
+    private bool hasSpawned = false;
+
+    void Update()
     {
-        if (!other.CompareTag("Player")) return;
+        if (hasSpawned) return;
 
-        Instantiate(treePrefab, spawnPoint.position, Quaternion.identity);
+        if (player.position.y < transform.position.y - 3f)
+        {
+            hasSpawned = true;
+
+            float treeHeight = GetComponent<SpriteRenderer>().bounds.size.y;
+            Vector3 spawnPos = transform.position + Vector3.down * treeHeight;
+
+            Instantiate(treePrefab, spawnPos, Quaternion.identity);
+        }
     }
 }