Connecting a controller
Play Codenames: Party on Netflix using your mobile phone or tablet as a controller. Other controllers aren't supported at this time.
Play on TV: Each player will need to use a mobile phone or tablet as a controller to play.
Play on a computer: You can use your mobile phone or tablet as a controller, or you can use a keyboard and mouse.
You don’t need to be signed in to any particular Netflix account on your device to connect it as a controller. Any Netflix account data or information will not be shared.
Note: Physical gamepads and other controllers aren't supported at this time.

If you're having problems connecting your phone or tablet, see How to use a phone or tablet as a controller to play games on Netflix.