player controller script jump buttom

hello I have a problem to implement the jump button in a 2d game I managed to route so that the horizontal movement with the joystick receives me but I cannot connect it with a jump button to be able to have the app on my cell phone: here is the player controller script:

estoy tomando el script del de un juego 2d de unity : using System.Collections; using System.Collections.Generic; using UnityEngine; using Platformer.Gameplay; using static Platformer.Core.Simulation; using Platformer.Model; using Platformer.Core;

namespace Platformer.Mechanics {

 public class PlayerController : KinematicObject
 {
     public AudioClip jumpAudio;
     public AudioClip respawnAudio;
     public AudioClip ouchAudio;

     
     public float maxSpeed = 7;
     
     public float jumpTakeOffSpeed = 7;

     public JumpState jumpState = JumpState.Grounded;
     private bool stopJump;
    
     public Collider2D collider2d;
     
     public AudioSource audioSource;
     public Health health;
     public bool controlEnabled = true;

     bool jump;
     Vector2 move;
     SpriteRenderer spriteRenderer;
     internal Animator animator;
     readonly PlatformerModel model = Simulation.GetModel<PlatformerModel>();

     public Bounds Bounds => collider2d.bounds;

     void Awake()
     {
         health = GetComponent<Health>();
         audioSource = GetComponent<AudioSource>();
         collider2d = GetComponent<Collider2D>();
         spriteRenderer = GetComponent<SpriteRenderer>();
         animator = GetComponent<Animator>();
     }

     protected override void Update()
     {
         if (controlEnabled)
         {
             move.x = Input.GetAxis("Horizontal");
             if (jumpState == JumpState.Grounded && Input.GetButtonDown("Jump"))
                 jumpState = JumpState.PrepareToJump;
             else if (Input.GetButtonUp("Jump"))
             {
                 stopJump = true;
                 Schedule<PlayerStopJump>().player = this;
             }
         }
         else
         {
             move.x = 0;
         }
         UpdateJumpState();
         base.Update();
     }

     void UpdateJumpState()
     {
         jump = false;
         switch (jumpState)
         {
             case JumpState.PrepareToJump:
                 jumpState = JumpState.Jumping;
                 jump = true;
                 stopJump = false;
                 break;
             case JumpState.Jumping:
                 if (!IsGrounded)
                 {
                     Schedule<PlayerJumped>().player = this;
                     jumpState = JumpState.InFlight;
                 }
                 break;
             case JumpState.InFlight:
                 if (IsGrounded)
                 {
                     Schedule<PlayerLanded>().player = this;
                     jumpState = JumpState.Landed;
                 }
                 break;
             case JumpState.Landed:
                 jumpState = JumpState.Grounded;
                 break;
         }
     }

     protected override void ComputeVelocity()
     {
         if (jump && IsGrounded)
         {
             velocity.y = jumpTakeOffSpeed * model.jumpModifier;
             jump = false;
         }
         else if (stopJump)
         {
             stopJump = false;
             if (velocity.y > 0)
             {
                 velocity.y = velocity.y * model.jumpDeceleration;
             }
         }

         if (move.x > 0.01f)
             spriteRenderer.flipX = false;
         else if (move.x < -0.01f)
             spriteRenderer.flipX = true;

         animator.SetBool("grounded", IsGrounded);
         animator.SetFloat("velocityX", Mathf.Abs(velocity.x) / maxSpeed);

         targetVelocity = move * maxSpeed;
     }

     public enum JumpState
     {
         Grounded,
         PrepareToJump,
         Jumping,
         InFlight,
         Landed
     }
 }

}