Добавил отображение текущей волны

Assets/Scripts/UI/WaveViewer.cs

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+using UnityEngine;
+using TMPro;
+
+[RequireComponent(typeof(TextMeshProUGUI))]
+public class WaveViewer : MonoBehaviour
+{
+    [SerializeField] private GameManager _gameManager;
+
+    private TextMeshProUGUI _text;
+
+    private void OnEnable()
+    {
+        _gameManager.OnLevelChanged += OnLevelChanged;
+    }
+
+    private void OnDisable()
+    {
+        _gameManager.OnLevelChanged -= OnLevelChanged;
+    }
+
+    private void Start()
+    {
+        _text = GetComponent<TextMeshProUGUI>();
+    }
+
+    private void OnLevelChanged(GameManager.OnLevelChangedEventArgs e)
+    {
+        _text.text = $"Wave {e.CurrentLevel} / {e.TotalLevels}";
+    }
+}

Assets/Scripts/UI/WaveViewer.cs.meta

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+fileFormatVersion: 2
+guid: 693cd83c49e2a794182cce4d2c8bc411