MULTIMEDIA

The most awesome feature of the upcoming puzzle-platformer game LittleBigPlanet is its intuitive, on-the-fly level editor that lets players create their own surprisingly detailed run-and-jump games.

After concocting their levels, players can push a button and share them online as easily as posting a YouTube video. Sony has invited thousands of gamers to test their level-designing chops with a scaled-back beta version of the PlayStation 3 game. LittleBigPlanet will be in stores Nov. 21.

Here are ten of the best user-created levels we've found so far, and the names of their creators.

10. AsianHeights by Plugpin

AsianHeights incorporates many of the things that amateur designers can instantly create with LittleBigPlanet's editor: jumping challenges, puzzles and mazes. Many of the parts -- like the background music, the water wheels and the skateboard -- are prefabricated, but LittleBigPlanet allows players to mix and mash these elements into unique challenges.

Defining moment: Ascending into the clouds, which, in a unique aesthetic touch, are made of blocks of wood and strung together with pieces of rope.