The name of the game Cleaner speaks for itself. You must clear the grid from the dark squares at fifty levels. To do this, just click on one of the squares and it will disappear, but four new ones will appear around it. That is, by clicking on any of the selected cells. You will provoke changes in the four around her. You need to come up with such an order of pressing so that in the end not a single dark cell remains. This will require logic and a little analysis. If you are careful, everything will turn out quickly and easily in Cleaner, even if. that the tasks are gradually getting more complicated.
