Falling Sand Blocks

It looks like a classic tetris game but it is really challanging as new rules are added. When the blocks go down to the bottom, the sands will be dissolved from them.
How to play: When the blocks go down from the top of the screen, you would need to manipulate them and arrange in an order of arrays that have the same color. The more rows of the same color you have, the more score you would get.