Incorrectly placed crosses are also considered a mistake

Players fill the cells with colored squares or crosses according to the row or column rules. If you make a mistake, then the right solution will be automatically entered into the cell, and you will lose one life. At the beginning of the game you are given three lives, and you can always earn extra lives by viewing ads.

Also, don't forget to switch the instruments for filling the cells in time. To do so, tap the switch at the bottom of the screen.