Block puzzle Tetris consists of blocks of different shapes that fall from the top of the screen one after another. By adjusting the position and direction of the blocks players can make them spell one or several pieces at the bottom of the screen. These complete bars will disappear immediately making room for the newly fallen plates and at the same time players will be rewarded with points. The blocks that have not been eliminated are piling up. Once they reach the top of the screen the players lose and the game is over.