Fast Block is an engaging puzzle game for mobile device.
its easy to learn to play and fun to master gameplay, but its still a challenge for you to play with. because it will discard a block if you havent used one block in specified seconds, and one random cell of gird will be invalid at the same time.
Drag one block and drop it into the gird to create and destroy full lines both vertically and horizontally, keep the grid from filling with blocks.
One of the invalid cells of grid will be recovered when a line destroy.
Enjoy the puzzle game!