Puffin tv browser does the same thing and supports voice search.

Hit up the dev on Twitter. Hes also the owner of the Amazon fire TV news website.

The app wasn't designed with an ATV launcher option. You can use this site to make your own:

http://atvlauncher.trekgonewild.de/index.php

That said, why are you even using that app on the Shield? There are far better options.