This is Sky Jumper Sol, a new DSiWare game developed by Nintendo. The objective in Sky Jumper Sol is to pull yourself the top of every stage.
It’s a little reminiscent of some of the areas in Super Mario Galaxy where you need to pull yourself from star to star, if you’ve played that game. Sky Jumper Sol has you collecting items and dodging obstacles along the way.
Sky Jumper Sol hits the Japanese DSiWare service on November 10th for 200 DSiWare points ($2). Here’s a few screenshots of the swinging sun.