Create Mode is where you are able to let your creative juices flow by using your tools to create objects and levels and then release them to the public to show off your clever creation skills. It is a mode accessed via the My Moon option in the Pod where you can create levels on one of several given spots then publish your finished level to get Trophies, friend requests, hearts, and good ratings. You can also just create objects and save them individually or create a level and not publish it. The main idea is, just be creative in any way you can possibly think of.