This is a game that you'll find in the extras menu. On this game you have to explode the blocks, but only when they are in groups of at least three, of the same color, and touching (up, down right or left).
New blocks will raise moving up  the complete structure. If the structure hit the roof of the board you lose the game.  Eventually some special bombs will appear, and these are used to explode all blocks of the same color. The control on this game is made by the mouse, clicking over the blocks on the board.

On higher levels the blocks start to appear with a higher velocity, then you'll need to have a lot of attention and ability to win this game.