big laser changes to player

Player.cs

public class Player : MonoBehaviour
{
[SerializeField]
private GameObject _bigLaser, _laserCharge;

private bool _isBigLaserActive = false;
[SerializedField]
AudioSource _chargingSound, _bigLaserSound;

    void FireLaser()
    {


        _canFire = Time.time + _fireRate;
        Vector3 offset = new Vector3(0, 1.05f, 0);
        if(_isBigLaserActive == false) { 
            _ammoCount--;
            if (_ammoCount < 0)
            {
                _ammoEmpty.Play();
                _ammoCount = 0;
            }

            else if (_isTripleShotActive == true && _ammoCount > 0)
            {
                Instantiate(_tripleShot, transform.position, Quaternion.identity);
                _laserSound.Play();
            }
            else if (_ammoCount > 0)
            {
                Instantiate(_laserPrefab, transform.position + offset, Quaternion.identity);
                _laserSound.Play();
            }

            _uiManager.UpdateAmmoCount(_ammoCount);
        }
    }
        public void BigLaserActive()
    {
        _powerupSound.Play();
        if (_isBigLaserActive != true) { 
            _isBigLaserActive = true;
            if (_bigLaser != null)
            {
                _chargingSound.Play();
                _laserCharge.SetActive(true);

                StartCoroutine(ChargeOff());

            }
        }
    }
        
    IEnumerator ChargeOff()
    {
        yield return new WaitForSeconds(2.0f);
        _laserCharge.SetActive(false);
        BigLaser();
    }

    void BigLaser()
    {
        _bigLaserSound.Play();
        _bigLaser.SetActive(true);
        StartCoroutine(BigLaserCoolDown());
    }


    IEnumerator BigLaserCoolDown()
    {
        yield return new WaitForSeconds(5.0f);
        _isBigLaserActive = false;
        _bigLaser.SetActive(false);
        
    }
    }