A Tetris game is a classic puzzle game that involves manipulating falling shapes called tetrominoes. The goal is to arrange the tetrominoes in such a way that they form complete horizontal lines across the 10-cell wide playfield. When a line is completed, it disappears and the tetrominoes above it move down, freeing up space and scoring points. The game ends when the tetrominoes reach the top of the playfield and no more moves are possible