jump script

void Update()
    {

        grounded = Physics2D.IsTouchingLayers(myCollider, whatIsGround);

        myRigidbody.velocity = new Vector2(moveSpeed, myRigidbody.velocity.y);

        if (Input.GetKeyDown(KeyCode.Space) || Input.GetMouseButtonDown(0))
        {
            if (grounded)
            {
                myRigidbody.velocity = new Vector2(myRigidbody.velocity.x, jumpForce);
            }
        }
    }