LoadArena(_arenaSceneName);
        LoadFirstLevel(_startingLevel);

        var targets = GameObject.FindGameObjectsWithTag("Target");
        print(targets.Length);
        _numberOfTargets = targets.Length;
        _startTime = _time = Time.time;

        _guiScript = GetComponent<GuiScript>();
    }

    private void LoadArena(string arenaSceneName)
    {
        StartCoroutine(LoadScene(arenaSceneName));
    }

    IEnumerator LoadScene(string sceneName)
    {
        print("Loading Scene: " + sceneName);
        var op = SceneManager.LoadSceneAsync(sceneName, LoadSceneMode.Additive);
        while (!op.isDone)
            yield return null; // wait minimum step
        yield break;
    }

    private void LoadFirstLevel(string stageName)
    {
        StartCoroutine(LoadScene(stageName));
    }