There is a pattern to the keys you have to press. Together they make a name or word. Can you guess what it is? On viewport widths 412px or greater, press the red circle to type your answer in the input and then press return. If you don't guess correctly, you will receive an error message. If you do, a secret phrase will be revealed! Pressing the delete key will return the "keyboard" to its initial state.
On viewport widths less than 412px, simply type in the input field and press return. And to restore everything to the default state, press the delete key.