Click on the ones, when swapped positions with the one next to it, will match three in a row. Or four. Or, if it makes a T shape, or a L shape (with five blocks), everything surrounding the involved blocks immediately can be taken away/matched.
Evil aliens have decided to kill everyone on Earth! Fortunately, they've given you two minutes to save as many as you can. All you have to do is name a country to save everyone in it.
However i think there might be a few mistakes in this