The figures in the tetris are called tetramino - a group of four squares. In the game all 7 types of tetramino exists. They appear randomly on the top and begin to fall down. During their fall you can rotate and move them left and right. The "flight" continues until the figure reaches the bottom or fall over some other element. The goal is to arrange the tetramino, so the rows are fully filled. Every row with no empty spaces on it disappear. The level and the speed increases with every 10 removed lines. The game ends when some new teramino hits the upper corner of the field.
The game can be played with arrow keys and/or with I, J, K, L. Left arrow and I keys rotates the tetramino. Down and/or K - lour figure more quickly (for more point). Space bar and/or M - fall down. The game can be paused with Pause/Break or P.
Points are received for each piece, and each removed line. Therefore the objective of the game is to play as long as possible. Removal of a line brings you a bonus of 100 points, 2 lines - 300, 3 - 600, for 4 lines (tetris) - 1000 points. As less figure falls freely, the more points you get it so it is recommended that you use rapid fall (down arrow or Space bar).