The best "casual" game there is! An absolute joy to play.
The premise is simple, you're given a set of blocks and a certain objective (Such as knocking them down, or picking certain one's up "janga style") the way you win is to find the weakest point or create a rube goldburg effect with the different "bloxes", such as: "Bomb bloxes" which explode when hit. "Chemical bloxes" which explode when two "chem bloxes" hit together. and "Ghost bloxes" which vanish when it leaving a tower of bloxes to come crashing down.
There's single player mode with over 300 puzzles, and party mode which has puzzles that you a 4 other people can play with. The game has infinite replay value with a strong level editor which you can create huge levels of any shape and size. You can send levels to your friends via WiiConnect24/7.
The graphics are fine considering it's running on the havok physics engine. Everything is bright a cheerful. It's amazing that each of the bloxes actually have a shadow considering the amount of physical interaction going on.
The physics engine runs perfectly and simulates very accurately. It uses the Havok physics engine, which is the same engine used in Half-Life 2, Brawl, and mostly every other big hit game.
The controls use the Wiimote perfectly, everything is very well programed and thought out. The controls are very responsive and accurate.
If you have a Wii, there's no reason why you shouldn't pick this game up. It's simply the best there is.