Looks interesting. I hope you'll be able to play it in short sittings, 1 or 2 puzzles/challenges (whatever they are) at a time. I love thinking games but the tetris end is too simple and the FF end is way too complex (I like RPG's, just don't have enough time to finish them anymore). If Treasure Island Z combines the pick up play of tetris with the complexity of FF I'll have to add this type of game to my favorite genres list.
It would seem 3rd party devs are finally spending time thinking about how to make good games on the Wii. If they keep this up they'll put to rest the tired old "only Nintendo games sell on Nintendo consoles" chestnut.