Many games from our library are not adapted to be controlled using touchscreen or gamepad.
Some games do not have official support for a gamepad (implemented by game developers). They might be sometimes hard to control through touchscreen and gamepad. Of course, we are doing our best to map games for those control methods. But it’s still very hard to play for example strategic game like Starcraft or FPS fast-paced game like CS:GO on a touchscreen using only two fingers :)
The exact same issue might appear for some games and gamepad. Just try to imagine playing League of Legends or Dota 2 on a controller. Yeah! It’s very hard to imagine and trust us, we were trying to do that and it fits only for slow casual plays.