public IEnumerator GameOver()
    {
        if (currentscore > highscore)
        {
            highscore = currentscore;
        }
        PlayerPrefs.SetInt("Highscore", highscore);

        tileMoveSpeed = 0;

        player.GetComponentInChildren <Animator>().enabled = false;

        player.GetComponent <Rigidbody>().constraints = RigidbodyConstraints.None;
        player.GetComponent <Rigidbody>().AddForce(Vector3.up * 10f, ForceMode.Impulse);
        player.GetComponent <Rigidbody>().AddForce(-Vector3.right * 5f, ForceMode.Impulse);
        player.GetComponent <Rigidbody>().AddTorque(Vector3.forward * 10f, ForceMode.Impulse);
        player.GetComponent <Rigidbody>().AddTorque(Vector3.right * 3f, ForceMode.Impulse);

        //Destroy(player.gameObject, 2);

        yield return(new WaitForSecondsRealtime(2));

        gameOverScreen.SetActive(true);
        gameOverScreen.GetComponent <UnityEngine.UI.Text>().text = "Your Score: " + currentscore + "\n Highscore: " + highscore;
    }