
So, my wife picked this up yesterday, and we had a chance to play for a couple hours last night. So, here's a hasty review:
This game is out-and-out designed to demo the Wii Remote. They tell you this when the game first starts. The nine minigames are simple to play and a lot of fun, and its integration with the Mii Channel is like Wii Sports, which makes things all the more fun.
The game absolutely lacks depth. Totally. There are nine minigames, and that's it. You play them, you have your fun, and you turn off the game. AFAIK, there's no secret levels, no bonus to unlock. You do get medals at certain levels (bronze, silver, gold, and platinum, just like Wii Sports), but otherwise, you just play.
I think the big draw for this is Wii Remote bundled with the game. Considering that a Wii Remote costs $40, and the bundle is $50, you're absolutely getting your money's worth with this game. Like Warioware, this game is a great party game. It's only two-player, but the games go quickly, so it's not really a problem.
Verdict: I would be upset if I bought this game standalone, but since it cost essentially ten bucks, I'm very happy with Wii Play. It probably won't get the kind of lavish attention that I give Wii Sports, but it's great for some quick fun.