Globe & Mail game writer says Wii Music's accessibility makes it immediately engaging, but that there aren't any modes or goals to provide a reason to keep playing.
"There are no goals. There's no scoring, no career mode, and no achievements. Aside from gradually unlocked songs and venues, there is nothing to work toward, which gives people little reason to keep playing
Of course, humans have had fun playing music without the artificial goals of a video game for millennia. But Wii Music's simplicity works against a music makers' desire for creativity. All we can do is control when our instruments make a sound; we have no power over which notes we pluck, and thus no ability to meaningfully satisfy our artistic aspiration."