Classic Tetris

The game has seven types of bricks: I (vertical), J, L, O (square), S, T, Z. We see every brick is made of 4 small squares put together. We can see that brick blocks as rectangles of different sizes.
The other image is generated when rotating the basic blocks corresponding angles of 90 degrees, 180 degrees, 270 degrees.

A random sequence of falling Tetriminos playground (a vertical rectangle, known as "good" or "matrix").
The objective of the game is to move the blocks are falling slowly down tiles in size rectangular rows x 12 columns 24 (on the screen). Where there is not bricks and move to that location. Players put the blocks so that the blocks fill one horizontal line to score and that row will disappear.