При нажатии пробела персонаж прыгает, но если зажать пробел то персонаж взлетает, как исправить?

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
 
public class Player : MonoBehaviour
{
    [SerializeField] private float speed = 1f;
    [SerializeField] private int lives = 5;
    [SerializeField] private float jumpForce = 10f;
    [SerializeField] private GameObject player;
    [SerializeField] private Rigidbody2D rb;
    [SerializeField] private SpriteRenderer sprite;
    private bool isGrounded;
    public Transform groundCheck;
    public float checkRadius;
    public LayerMask whatIsGround;
 
   
        private void Start()
    {
      
    }
    private void Awake()
    {
        rb = GetComponent<Rigidbody2D>();
        sprite = GetComponent<SpriteRenderer>();
 
    }
 
    private void Run()
    {
        Vector3 dir = transform.right * Input.GetAxis("Horizontal");
        transform.position = Vector3.MoveTowards(transform.position, transform.position + dir, speed * Time.deltaTime);
        sprite.flipX = dir.x < 0.0f;
    }
    private void FixedUpdate()
    {
        isGrounded = Physics2D.OverlapCircle(groundCheck.position, checkRadius, whatIsGround);
    }
    private void Update()
    { 
        if (isGrounded == true)
        {
           
        }
        if (Input.GetButton("Horizontal"))
        {
            Run();
        }
        if ( Input.GetButton("Jump") )
        {
            rb.velocity = Vector2.up * jumpForce;
           
        }
            else if (Input.GetButton("Jump") )
        {
            rb.velocity = Vector2.up * jumpForce;
        }
        
    }
    private void Jump()
    {
        rb.AddForce(transform.up * jumpForce, ForceMode2D.Impulse);
    }
    private void CheckGround()
    {
        Collider2D[] collider = Physics2D.OverlapCircleAll(transform.position, 0.3f);
        if (isGrounded = collider.Length > 1)
        {
            isGrounded = true;
        };
    }
}

if (isGrounded == true)
        {
            if ( Input.GetButton("Jump") )
        {
            rb.velocity = Vector2.up * jumpForce;
           
        }
        }