Defends a city four elements energies tower, this time plays the family to have to use each kind of ability different □h tower to resist the enemy. The game selects basic, intermediate, the difficult button choice difficulty pattern, the game and generally defends a city the game dissimilar place is - right side has to be able the meter (P o w e r), must have the power supply tower revolution according to [ zy ], otherwise can stop. This not so long as tests plays family's brains, but also must train plays family's finger, the mouse clicks on [ sz ] right side the tower to plant constructs the tower.