added tree fab

as well as the scripts, spawntrigger, spawnpoint and tree cloning

Game/Assets/Scripts/TreeSpawner.cs

@@ -0,0 +1,25 @@
+using UnityEngine;
+
+public class TreeSpawner : MonoBehaviour
+{
+    public GameObject treePrefab;
+    public Transform spawnPoint;
+
+    private bool hasSpawned = false;
+    private static float nextAllowedSpawnTime = 0f;
+
+    private void OnTriggerEnter2D(Collider2D other)
+    {
+        if (!other.CompareTag("Player")) return;
+        if (hasSpawned) return;
+
+        if (Time.time < nextAllowedSpawnTime) return;
+
+        hasSpawned = true;
+        nextAllowedSpawnTime = Time.time + 1f;
+
+        Instantiate(treePrefab, spawnPoint.position, Quaternion.identity);
+
+        gameObject.SetActive(false);
+    }
+}