void Update()
 {
     if (Input.GetKeyDown("up") || Input.GetKeyDown("down"))
     {
         //if neither active, pick one
         if (!startStroke.activeSelf && !creditsStroke.activeSelf)
         {
             if (Input.GetKeyDown("up"))
             {
                 startStroke.SetActive(true);
             }
             else
             {
                 creditsStroke.SetActive(true);
             }
         }
         //if one active, swap them
         else
         {
             startStroke.SetActive(!startStroke.activeSelf);
             creditsStroke.SetActive(!creditsStroke.activeSelf);
         }
     }
     if (Input.GetKeyDown("return"))
     {
         if (startStroke.activeSelf)
         {
             nav.goToInfo();
         }
         else if (creditsStroke.activeSelf)
         {
             nav.goToCredits();
         }
     }
 }