Tetris is a "real time" puzzle. Small shapes consisting of 4 blocks arranged into 7 different patterns fall from the top of the Playfield to the bottom. Your job is to rotate the shapes as they fall and fit them together to complete lines. When you fill an entire line with blocks, that line is removed from the screen. The game ends when the first block reaches the top.
Controls: The blocks are controlled by the arrow keys on your keyboard. The "up arrow" rotates the shape.