I made an arcade Joystick with integrated Simon Says Game. It used a Teensy++ 2.0 board, but I have also ported it to Arduino Leonardo. The project it published here:
https://www.hackster.io/user3853574654/arcade-joystick-x4-plus-simon-game-384309
You can see a video of the system working here:
https://www.youtube.com/watch?v=ENW7n0ni5kg&feature=youtu.be