public void StartBossLevel()
 {
     player.gameObject.GetComponent <Rigidbody2D>().velocity = new Vector2(0, 0);
     buttonManager.SetAmmo(playerShoot.maxAmmo);
     buttonManager.SetLives(livesManager.maxLives);
     player.transform.position = playerBossStartPos.transform.position;
     playerStartPos            = playerBossStartPos.transform.position;
     postGame.SetBossFightCam(); // toggles boss camera and enable boss area gameobjects
     postGame.SetMainCamActive(true);
     soundManager.KillAudio();
     bossMusic.Play();
 }