Warioware just got better with the motion sensor technology of the Wii.
The different forms add challenge to the games, so you might have to go from a steering wheel position, to a samurai position in 3 seconds! the limited tries in each stage make it tough when the game ups its pace.
Single player has you go through different stages that have nothing to do with each other, as each level has its own storyline. The bonus levels are either leveled-up versions of certain micro-games, or entirely new levels that have you do micro-games under certain curcumstances. Freeplay mode lets you play as long as you want, but gets faster and faster the more you play, pretty soon it gets too fast, but that adds to the fun.
Multiplayer is like single player in every way except that if you lose, you either lose the game, or lose time in the bomb games.
Overall, Warioware Smooth Moves is a game that is fun both in single and multiplayer. Worth the wait!