In Stack, some colored blocks fall from sky to ground to form stacks. You need to destroy these stacks before they reach the top of the screen. To do that, tap with your finger on a group of colored blocks to destroy it and win points. In addition, slide the rows and columns of blocks with your finger to form largest groups and win more points.
Stack has 4 difficulty game mode : Beginner, Master, Skilled, and Ultimate. Each game mode has more than 150 levels of increasing difficulty. In addition, Stack has a colorblind mode.
To try Stack, download it from the Windows Phone Store.
See the video demo after the break.