Implement enemies getting to a finish, enemy dying

Assets/Scripts/Data/Level.cs

@@ -6,6 +6,9 @@ using UnityEngine;
 [CreateAssetMenu(fileName = "Level", menuName = "Data/Level")]
 public class Level : ScriptableObject
 {
+    [SerializeField]
+    public int health = 10;
+
     [SerializeField]
     public Wave[] waves = new Wave[0];
 }