fgm24/Assets/Scripts/Player/PlayerCollideAttack.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlayerCollideAttack : MonoBehaviour
{
    [SerializeField] Rigidbody2D body;
    [SerializeField] LayerMask damageLayers;

    [SerializeField] AnimationCurve speedToDamage;

    public void OnCollisionEnter2D(Collision2D collision)
    {
        if (collision.collider.tag != "Enemy") return;

        HealthComponent health = collision.collider.gameObject.GetComponent<HealthComponent>();
        if (health == null)
            health = collision.collider.transform.parent.GetComponent<HealthComponent>();
        if (health == null) return;
            health = collision.collider.gameObject.GetComponentInChildren<HealthComponent>();
        if (health == null) return;

        float speed = body.velocity.magnitude;
        float damage = speedToDamage.Evaluate(speed);
        health.TakeDamage(damage);
    }
}