private void PlayerController()
    {
        if (touchingGround== true)
        {
            if (Input.GetKey(KeyCode.W))
            {
                GetComponent<Rigidbody>().AddRelativeForce(Vector3.forward * speed);
            }
            if (Input.GetKey(KeyCode.S))
            {
                GetComponent<Rigidbody>().AddRelativeForce(Vector3.back * speed);
            }
            if (Input.GetKey(KeyCode.D))
            {
                GetComponent<Rigidbody>().AddRelativeForce(Vector3.right * speed);
            }
            if (Input.GetKey(KeyCode.A))
            {
                GetComponent<Rigidbody>().AddRelativeForce(Vector3.left * speed);
            }
            if (Input.GetKeyDown(KeyCode.Space))
            {
                GetComponent<Rigidbody>().AddForce(Vector3.up * speed);
            }
        }
}