Some things

Assets/Scripts/Level 4/EnemyWeakPoint4.cs

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+using UnityEngine;
+
+namespace Level4 {
+	public class EnemyWeakPoint4 : MonoBehaviour {
+
+		Enemy4 _enemy;
+	
+		void Awake() {
+			_enemy = GetComponentInParent<Enemy4>();
+		}
+
+		void OnTriggerEnter2D(Collider2D other) {
+			if (!other.CompareTag("Player")) return;
+			PlayerMovement4 player = other.GetComponent<PlayerMovement4>();
+
+			player.Rb.velocity = new Vector2(player.Rb.velocity.x, player.deathForce);
+			player.Animator.SetTrigger(PlayerMovement4.Jump1);
+			Destroy(_enemy.gameObject);
+		}
+	}
+}