Update layers for GameObjects and add EnemyDeathBehavior class

Assets/Scripts/Systems/EnemyDeathBehavior.cs

@@ -0,0 +1,15 @@
+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

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 73900af7351645fdb19d016d621feb35
+timeCreated: 1752264813

Assets/Scripts/Weapons/MeleeAttack.cs

@@ -20,8 +20,14 @@ namespace Weapons
                 if (hit.gameObject == character.gameObject) continue;
                 
                 var damage = GetFinalDamage();
-                health.TakeDamage(damage);
+                health?.TakeDamage(damage);
             }
         }
+        
+        private void OnDrawGizmosSelected()
+        {
+            Gizmos.color = Color.red;
+            Gizmos.DrawWireSphere(transform.position, GetFinalRange());
+        }
     }
 }

Assets/Scripts/Weapons/Weapon.cs

@@ -11,7 +11,6 @@ namespace Weapons
     {
         private float timer;
         
-        [SerializeField] private float cooldown = 1f;
         [SerializeField] protected Character character;
         [OdinSerialize, InlineProperty] public WeaponStats weaponStats = new();