Swerve Control Unity C#

Hi I am creating a hyper casual game with unity, but I have encountered a problem with the swerve control (I have also seen many git hubs but even these do not work perfectly) I've put this in my code:

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

public class PlayerMovement : MonoBehaviour
{
    private float lastframeposx;
    private float movefactorx;
    public float MoveFactorX => movefactorx;

    public Camera m_MainCam;

    private float speed = 2.0f;
    [SerializeField]
    GameObject character;
    [SerializeField] private float swerveSpeed = 0.5f;
    [SerializeField] private float maxSwerveAmount = 1f;



    // Start is called before the first frame update

    void Start()
    {

    }

    // Update is called once per frame
    void Update()
    {
        transform.position += Vector3.forward * speed * Time.deltaTime;  
        Cammina();
        /*Vector3 destra = Camera.main.ScreenToWorldPointt(Input.touches[i].position);
        transform.position += Vector3.zero  destra;*/
    }



    void Cammina()
    {
        if(Input.GetMouseButtonDown(0))
        {
            lastframeposx = Input.mousePosition.x;
            float swerveAmount = Time.deltaTime * swerveSpeed * MoveFactorX;
            swerveAmount = Mathf.Clamp(swerveAmount, -maxSwerveAmount, maxSwerveAmount);
            transform.Translate(swerveAmount, 0, 0);
        }
        else if (Input.GetMouseButton(0))
        {
            movefactorx = Input.mousePosition.x - lastframeposx;
            lastframeposx = Input.mousePosition.x;
            float swerveAmount = Time.deltaTime * swerveSpeed * MoveFactorX;
            swerveAmount = Mathf.Clamp(swerveAmount, -maxSwerveAmount, maxSwerveAmount);
            transform.Translate(swerveAmount, 0, 0);
        }
        else if(Input.GetMouseButtonUp(0))
        {
            movefactorx = 0f;
            float swerveAmount = Time.deltaTime * swerveSpeed * MoveFactorX;
            swerveAmount = Mathf.Clamp(swerveAmount, -maxSwerveAmount, maxSwerveAmount);
            transform.Translate(swerveAmount, 0, 0);
        }
    }

    /*void vaidoveschiacciato()
    {
        if (Input.touchCount > 0 && Input.touches[0].phase == TouchPhase.Began)
        {
            Ray ray = Camera.main.ScreenPointToRay(Input.touches[0].position);
            RaycastHit hit;

            if(Physics.Raycast(ray, out hit))
            {
                if(hit.collider != null)
                {
                    transform.position += hit.collider.GetComponent<Transform.position> * speed * Time.deltaTime;
                }
            }
        }
    }*/



}

1 Problem: he don't go when the finger is 2 Problem: How do I eliminate the movement from right to left (Without making it go out of the path)

(Langauge: C#)