A Pen created at CodePen.io. You can find this one at https://codepen.io/kuljeet-123/pen/dyoMLzQ.
User Story: I am presented with a random series of button presses. User Story: Each time I input a series of button presses correctly, I see the same series of button presses but with an additional step. User Story: I hear a sound that corresponds to each button both when the series of button presses plays, and when I personally press a button. User Story: If I press the wrong button, I am notified that I have done so, and that series of button presses starts again to remind me of the pattern so I can try again. User Story: I can see how many steps are in the current series of button presses. User Story: If I want to restart, I can hit a button to do so, and the game will return to a single step. User Story: I can play in strict mode where if I get a button press wrong, it notifies me that I have done so, and the game restarts at a new random series of button presses.