Добавил возможность отслеживать спавн и уничтожение врагов

Assets/Scripts/SpawnDeathEnemyController.cs

@@ -0,0 +1,41 @@
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.Events;
+
+public class SpawnDeathEnemyController : MonoBehaviour
+{
+    [SerializeField] private GameManager _gameManager;
+    [SerializeField] private EnemySpawner _enemySpawner;
+    [SerializeField] private Wallet _wallet;
+    [SerializeField] private UnityEvent _onLastEnemyDestroyed;
+
+    public event UnityAction OnLastEnemyDestroyed
+    {
+        add => _onLastEnemyDestroyed.AddListener(value);
+        remove => _onLastEnemyDestroyed.RemoveListener(value);
+    }
+
+    private readonly List<Enemy> _enemies = new();
+
+    private void OnEnable()
+    {
+        _enemySpawner.OnEnemySpawned += OnEnemySpawned;
+    }
+
+    private void OnDisable()
+    {
+        _enemySpawner.OnEnemySpawned -= OnEnemySpawned;
+    }
+
+    private void OnEnemySpawned(Enemy enemy)
+    {
+        enemy.OnDeath += e => _wallet.AddMoney(e.KillReward);
+        enemy.OnDestroyed += () =>
+        {
+            _enemies.Remove(enemy);
+            if (_enemies.Count == 0)
+                _onLastEnemyDestroyed?.Invoke();
+        };
+        _enemies.Add(enemy);
+    }
+}