My little girl wanted to play jetpack joyride on the shield tv but it's not in the app store. I side loaded it but was unable to play because you have to touch the screen to start. I tired every button combination but nothing worked. I was just pressing all kinds and then either pressing the back button or exit and another button made a cursor come up on the screen. I was then able to control the mouse cursor with the right stick and click A as a screen tap to start the game. I am trying to repeat as now she wants to play again but I'm not sure what it is I'm doing to get it going besides pressing random buttons til it works.

EDIT - Figured it out, just pressing the back button on the controller brings up the prompt to exit the game. Then you just move the right stick and the mouse comes up and you can click anywhere to start the game.