Space Rescue Puzzle

What do you do when the outer-space get overcrowded with tiny, colorful aliens? You... blast them all off and free the space! How you do that? You simply match the identical ones, dragging your cursor along them, and witness as they pop and disappear off your screen! Keep connecting them, three by three, four by four (and the number of goofy looking little aliens that you can group into a pile might go higher and higher) and blast them all off!