unity 2d- skok postaci

Question

Potrzebuje pomocy!
Przeszukałam wiele forum i innych i nie mogę zaprogramować skoku w moim krypcie postac moze latac a nie powinna wedlug moich zamyslow... Proszę o pomoc potrzebuje aby potać mogła płynnie skakać. Oto skrypt (chodzenie też tu jest)
 

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

public class Player : MonoBehaviour
{

    public float moveSpeed;
    public float jumpHeight;

    public Transform groundCheck;
    public float groundCheckRadius;
    public LayerMask WhatIsGround;
    private bool grouned;
    public bool DoubleJump;
    public float speed = 3f;
    private Rigidbody2D rgbody;

    // Use this for initialization
    void Start()
    {
        rgbody = GetComponent<Rigidbody2D>();
    }

    void FixedUpdate() {

        grouned = Physics2D.OverlapCircle(groundCheck.position, groundCheckRadius, WhatIsGround);
    
    }

    // Update is called once per frame
    void Update()
    {
        if (grouned)
            DoubleJump = false;


        if (Input.GetKey(KeyCode.W))
        {
            rgbody.velocity = new Vector2(rgbody.velocity.x, speed);
        }
if (Input.GetKey(KeyCode.D))
        {
            GetComponent<Rigidbody2D>().velocity = new Vector2(moveSpeed, GetComponent<Rigidbody2D>().velocity.y);
        }

        if (Input.GetKey(KeyCode.A))
        {
            GetComponent<Rigidbody2D>().velocity = new Vector2(-moveSpeed, GetComponent<Rigidbody2D>().velocity.y);
        }

    }
}