Greatmathgame.com presents Stacker, a hyper-casual game that will hook you instantly! Your objective is to stack blocks on top of each other as high as possible, using your quick reflexes. But be careful! The sliding blocks move back and forth over your tower, and you need to time it perfectly to avoid any overlaps. Any overlap will result in a smaller level, with more challenging stacking. Keep building and stacking until you miss, and compete with your friends to reach the highest score! Enjoy playing Stacker, a free online game, using your mouse or touch controls.