Project Spark, Microsoft's build 'em up for Xbox and PC, is now available as an open beta on Xbox One. That means you no longer need to use a beta code to get access to the beta. Instead, you can simply search for the game on the Xbox Store.
With Project Spark, players can create and share their own games. With Xbox One, players can take advantage of Kinect to create their own motion capture to import into the game. Check out this montage of some highlights from the Xbox One closed beta: