Stacking : don't fall down

It's a great game to make a simple bet.
You can choose 10, 20, or 30 at the start of the game. This means the number of bricks. You can use 10 bricks if you choose 10, 20 bricks if you choose 20, and 30 bricks if you choose 30. The bricks move from side to side in the air and fall down when you touch the screen. After that, the bricks are continuously created and the goal of the game is to stack as high as possible.