Bullet.cs

using System;
using System.Collections;
using UnityEngine;

public sealed class Bullet : MonoBehaviour
{
    [SerializeField, Range(0, 150)] private float maxTravelDistance;
    [SerializeField, Range(0, 10)] private int damage = 1;
    
    private Rigidbody2D _rigidbody;
    private string _currentTargetToHit;
    private Vector2 _shootTarget;

    private void Awake() => _rigidbody = GetComponent<Rigidbody2D>();

    private void Update()
    {
        // if(HasReachedMaxDistance()) Destroy(gameObject);
    }

    public void ActiveBullet(Vector2 shootTarget, float shootingPower, string targetToHit)
    {
        _currentTargetToHit = targetToHit;
        _shootTarget = shootTarget;

        _rigidbody.velocity = _shootTarget * shootingPower;

        StartCoroutine(DeleteBullet());
    }

    private IEnumerator DeleteBullet()
    {
        yield return new WaitForSeconds(10);
        Destroy(gameObject);
    }

    private bool HasReachedMaxDistance()
    {
        var distance = (Vector2)transform.position - _shootTarget;
        return MathF.Abs(distance.magnitude) >= maxTravelDistance;
    }

    private void OnTriggerEnter2D(Collider2D col)
    {
        if(col.gameObject.HasTag("wall")) Destroy(gameObject);
        
        if(!col.gameObject.HasTag(_currentTargetToHit)) return;
        
        col.GetComponent<HealthData>().TakeDamage(damage);
    }
}