http://www.albinoblacksheep.com/flash/curveball.php It's a nice flash game that I've enjoyed on and off for the past few years as a quick little diversion. I think this would be a great DS game, it's rather simple yet surprisingly fun (mostly for being able to put spin on the ball). What the flash game has always lacked was a multiplayer mode. And obviously you'd just control the paddle with the stylus, nothing else really required, maybe tap the paddle when the ball makes contact for a bit more power. You wouldn't even really need the top screen for anything, maybe just for the score and other info. DS + Curveball + Wifi = Awesome!