The purpose of the game is empty the board by removing two or more squares. You can click on a group of squares provided that there are two of them or more linked together. The gravity laws apply here and the squares that are on top of removed squares will fall down. And when you remove an entire column, the columns to its right will go to the left.
Download and play:
https://play.google.com/store/apps/details?id=air.com.vmmobile.abacuslogichdfree
Download and play:
https://play.google.com/store/apps/details?id=air.com.vmmobile.abacuslogichdfree