Each level has a number of small square grids, each with a different number.
You need to click on the small squares to change the numbers in them so that the numbers in all the small squares are the target numbers, even if the level is completed.
The number of small squares will increase as the level of the level increases, and the connection between the target numbers will gradually increase.
Try to make the perfect connection as much as possible, and control the number of each small grid so that they can complete the level perfectly.