If you want to play Hangman with the PiFace Control And Display without a monitor you can
ssh from a Terminal of another computer:
ssh email@example.com(replace 192.168.1.1 with your RaspberryPi’s local I.P.).
If you don't know your RaspberryPi's local I.P. type the following command into a Terminal on the Pi
Under the heading
eth0 you should see a line starting with
inet addr:, the four numbers that follow this, separated by dots is your Pi's local I.P. (though this can change when you restart your Pi).
Once you're logged in, run the hangman game as normal.