It is a title screen. A game is started when the screen is tapped.
Tap the block of the same color, and it is removed. Only the block where at least more than three continues in the length or the side can be turned off. When the block is turned off, an upper block falls to the bottom.Block is four types.Tap the bomb when it appears sometimes, a block in the neighborhood can be destroyed forcibly.
It is a game over when a block exceeds an extreme upper step.