private void OnCollisionEnter(Collision collision)
    {
        //for destroying plane and displaying game over text
        if (collision.gameObject.CompareTag("Map"))
        {
            Cursor.visible = true;
            Destroy(gameObject);
            Instantiate(deathParticle, transform.position, deathParticle.transform.rotation);
            gameManager.GameOver();
        }

        //fpr displaying win text
        if (collision.gameObject.CompareTag("Finish") && point >= 6)
        {
            Cursor.visible = true;
            Destroy(gameObject);
            gameManager.Win();
        }

        //for displaying lose text when player finishes with not enough points
        if (collision.gameObject.CompareTag("Finish") && point < 6)
        {
            Cursor.visible = true;
            Destroy(gameObject);
            Instantiate(deathParticle, transform.position, deathParticle.transform.rotation);
            gameManager.Lose();
        }
    }