Any games that use iphone as second controller yet?

Has anyone worked out if there are any games in the app store yet that let a second player play using an ios device as controller, and if so, how you go about setting that up? I'm thinking of the Apple keynote where they showed 2 player Crossy Road for example. The version of Crossy Road currently in the app store doesn't seem to have this functionality yet.


If I go to Settings -> Remotes and Devices -> Bluetooth, it doesn't seem to pick up any of my ios devices (did successfully pair with my iphone during the initial Apple TV setup process though.)