Not sure how you'll use Chromecast's mirroring feature? Well, you could play tennis. About a year ago, Rolocule brought Wii-like gameplay to Apple users with Motion Tennis -- an app that leveraged Apple TV and iPhone AirPlay Mirroring to turn the user's handset into a virtual racket. Now the company is doing the same thing with Google's Chromecast. Using the mirroring feature announced at Google I/O, Rolocule has cooked up an early demo (available after the break) of Motion Tennis on a Nexus 5. The prototype has a noticeable input delay, but it's an excellent proof of concept for gameplay possibilities available to devices with screen mirroring. Don't have a Chromecast dongle? No worries, Rolocule says it's working on Miracast support too, and told Engadget that a public beta will be launching soon. Read on to see the Chromecast version of the game in action.