Don't know if you are still watching this thread, but the 7 buttons are not for 7 button games, but for neo-geo style games that use 4 buttons which you can rest your thumb, index, middle, and ring fingers on all at once. I also found it more useful for something like asteroids/space duel where you need instant access to 3 buttons, it is just easier for me to use my thumb, index, and middle fingers than index, middle and ring fingers (probably just a personal preference). Good luck with your design, and be sure to check out your top 10 games carefully to make sure they will work.