As covered in C3's official review, as well as many others', Art of Balance is one of WiiWare's finest puzzlers, but also one of the trickiest to complete.
The game's developer, Shin'en Multimedia, has kindly posted up videos detailing the best methods for clearing each level, be it the first and easiest, or last and most difficult.
Be sure to check out ArtofBalanceGuide.com if any puzzles are giving you grief, and for a comprehensive look at the background of the game, check out C3's exclusive interview with the studio's co-founder.