A really unique idea that can be really limiting at times.
The game makes great use of the Wiimote. For example, say you're playing tennis. As the ball comes towards you, instead of using the D-Pad to move your character to the ball, and then pressing 'A' to hit the ball, the character automatically moves for you, and as it gets near the ball, a simple flick of the wrist will do.
Another game to play, is boxing. This game uses the Nunchuk. With a Wiimote in one hand and a Nunchuk in the other, those emulate your fists. To guard, you simply hold both of them to your face. To punch with either hand, you simply strike towards the screen and you can do an array of combos like 2-hit combos, or uppercuts, hooks, but nothing too fancy. This is just a start for Wii, not EA's Fight Night.
Now, the main problem with the game, are the graphics and the limiting gameplay. The graphics are colorful, but they look too simplistic. Sure, simple is good, but that doesn't exactly mean too simple is really good. Now, the limiting gameplay on the other hand...well, it's limiting. What I mean by that is, as stated earlier, when you're playing tennis, instead of you moving the guy yourself, the computer moves him for you. And in boxing, you simply just stand there and duke it out with your opponent. But then again, I can somewhat understand why Nintendo did this, as they were merely introducing the dynamics of the Wiimote to the gamers, and didn't want to get too technical and complicated.
All and all, it's a fun humorous game that you can just pick up and play without knowing what you have to do. A good game for any kid, a good game for any adult, and a good game for any fat gamer who sucks at sports.