This game is easy to learn and play at low to medium levels. The higher levels add enough challenge to make it interesting for not only myself, but my 8 year old as well. The game also teaches multi-step planning and foresight as many of the challenges require creative problem solving to get so much mercury to a given place as a given color.
My only complaint is that it is only 1 player; however, due to the nature of the game, this is unavoidable since you tip and turn the world with the Wii remore to move the mercury.
Bottom line: A fun way to learn problem solving and strategy and develop eye-hand coordination without realizing it.
Mercury Meltdown is in many ways similar in concept to marble madness, a very old game. However in this new release the marble is flexible, moldable, even capable of being split into many pieces. It is a combination of speed and puzzle solving in a 3-D space while avoiding enemies and collecting prizes.
The controls use the wiimote to rotate the board similar to a wooden labyrinth. This can be quite touch and you may need fresh batteries in the controller because if it lags it can spell trouble.
Also there are a good number of mini games to unlock including a race track and tetris like game. Each mini game has several unlockable levels giving this game a lot to encourage you to complete everything 100%.
The only thing that holds it back from a perfect 10 is its learning curve. The jump from the tutorial to the first board is dramatic, and the jump from one level to the next can be as well. If you don't like dieing several times before you understand what you are supposed to do this one may be a bit frustrating. Remember it is a puzzle game too.