Kororinpa (Wii) - £19.95 delivered @ UWish !
Cheapest I could find..
Manufacturer's Description : Prepare to rock and roll as your brain does a loop the loop with the ultimate Wii puzzle game. Using tilting Wii's motion sensitive Wii Remote with poise and precision, players must seek to navigate their favourite cute and quirky balls, each with their own look and varying benefits, through complex 3D mazes. Therefore no complicated button combinations are necessary, the tactile controls allow players to tip and tilt their environment in all directions, even upside-down to 180 degrees - making the game intuitive and easy for anyone to pick up and play, whilst still remaining challenging and addictive.