Somewhat tedious, since you have to play 100 levels in each mode and they don‘t get more challenging or interesting, it‘s just a test of patience. The reward for that are pictures of Tingle to unlock, but sadly, some seem to be locked to the multiplayer mode, which I can‘t play.
Still, the game did improve my Balloon Fight abilities and makes me want to look into Balloon Kid on the Gameboy. Also, Tingle rules! Nintendo has to bring him back for more games.