I love the Game the only thing I would change is the current Audio Management, I would love if it wouldn't restart on scene changes. Besides that amazing game and I loved your video on it amazing video quality as well as amazing 3D Models :P

If you use an AudioManager you can easily add that functionality with these lines of code. If you need some more help you can Reply to my comment, I'll gladly help :D

 void Awake()
    {
        if (instance == null)
        {
            instance = this;
        }
        else
        {
            Destroy(gameObject);
            return;
        }
        DontDestroyOnLoad(gameObject);