Go to Settings > System > About Phone (or Software info), and when you see the words “Android version,” tap on it multiple times and you’ll see a logo for Nougat or Marshmallow. Tap a few times again and now press and hold on the screen. A secret minigame will appear.
Tap the triangle to start. See how long you can keep the Android character alive by tapping the screen to jump, and without hitting any obstacles. It’s not as easy as it looks!