Do you want to build a stone tower? In Stone Pillar, you have to tap and release the blocks to put them on the ground. You need to maintain the center of mass of the whole building so that it does not fall. As you build the tower, it will get higher. When it reaches the top, it will fall and you will get a new score. 

If you want to build a tower that will not fall, you need to keep adding blocks. When the tower gets high enough, it will start to feel heavy. If it falls, you lose the game. If you get stuck, you can restart the level. There are hundreds of beautifully designed levels to clear.