Update layers for GameObjects and add EnemyDeathBehavior class

Assets/Scripts/Systems/EnemyDeathBehavior.cs

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+using Interfaces;
+using UnityEngine;
+
+namespace Systems
+{
+    public class EnemyDeathBehavior : MonoBehaviour, IDeathBehavior
+    {
+        public void Die()
+        {
+            Destroy(gameObject);
+            // later let's add particle effects, sound effects, etc.
+            // and give player experience points
+        }
+    }
+}

Assets/Scripts/Systems/EnemyDeathBehavior.cs.meta

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+fileFormatVersion: 2
+guid: 73900af7351645fdb19d016d621feb35
+timeCreated: 1752264813