From the release:
Tap the screen, swipe the stylus and control the gyro to the beat of the music to maneuver Raphael through the unique streets of Paris, brought to life by stylish animations and vibrant 3D maps and landscapes.
Rhythm Thief & the Emperor’s Treasure offers a unique enjoyable single player experience, as well as toe-tapping multiplayer and uses StreetPass™. Unearth the clues hidden behind treasures scattered around Paris, call on your sense of rhythm and use all your puzzle solving skills to help Raphael get to the bottom of the mystery.
Rhythm Thief & the Emperor’s Treasure is expected out sometime in Q1 2012 for the Nintendo 3DS. For the moment check out some goodies in the form of a teaser trailer and some screens for you to enjoy.