GunSprint.cs

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

public class controller : MonoBehaviour
{

    [SerializeField] private bullet _bulletPrefab;
    [SerializeField] private Transform _spawnPoint;

    [SerializeField] private LayerMask _targetLayer;

    [SerializeField] private float _bulletSpeed = 12;
    [SerializeField] private float _torque = 120;
    [SerializeField] private float _maxTorqueBonus = 150;

    [SerializeField] private float _maxAngularVelocity = 10;

    [SerializeField] private float _forceAmount = 600;
    [SerializeField] private float _maxUpAssist = 30;

 /// Simple smoke effects and flash prefab and audio.
    [SerializeField] GameObject muzzleFlash;
    [SerializeField] GameObject smokeEffect;
    [SerializeField] Transform flashPos;
    AudioSource mAudioSource;
    [SerializeField] private float _maxY = 10;

    private Rigidbody _rb;
   

    private void Awake()
    {
       _rb = GetComponent<Rigidbody>();
        mAudioSource = GetComponent<AudioSource>();
    } 

    void Update()
    {

        // Clamp max velocity
        _rb.angularVelocity = new Vector3(0, 0, Mathf.Clamp(_rb.angularVelocity.z, -_maxAngularVelocity, _maxAngularVelocity));

        if (Input.GetMouseButtonDown(0))
        {
           


            // Spawn
            var bullet = Instantiate(_bulletPrefab, _spawnPoint.position, _spawnPoint.rotation);
            bullet.Init(_spawnPoint.forward * _bulletSpeed);
            var flash=Instantiate(muzzleFlash,flashPos.position,Quaternion.identity);
            var smoke=Instantiate(smokeEffect, flashPos.position,Quaternion.identity);
            smoke.transform.parent=gameObject.transform;
            Destroy(flash, 1f);
            mAudioSource.Play();
           

            // Apply force - More up assist depending on y position
            var assistPoint = Mathf.InverseLerp(0, _maxY, _rb.position.y);
            var assistAmount = Mathf.Lerp(_maxUpAssist, 0, assistPoint);
            var forceDir = -transform.forward * _forceAmount + Vector3.up * assistAmount;
            if (_rb.position.y > _maxY) forceDir.y = Mathf.Min(0, forceDir.y);
            _rb.AddForce(forceDir);

            // Determine the additional torque to apply when swapping direction
            var angularPoint = Mathf.InverseLerp(0, _maxAngularVelocity, Mathf.Abs(_rb.angularVelocity.z));
            var amount = Mathf.Lerp(0, _maxTorqueBonus, angularPoint);
            var torque = _torque + amount;

            // Apply torque
            var dir = Vector3.Dot(_spawnPoint.forward, Vector3.right) < 0 ? Vector3.back : Vector3.forward;
            _rb.AddTorque(dir * torque);
        }


    }
  
}