Tetris DS is a game that is loved by many people because it is so easy to play and very fun to play. The game is played by using four pieces of paper to form a square that is larger than any of the others. Once the square is made, the player can then move the piece next to the square over to the one above it and so on, creating a new square. It is very easy to play and a great way to get people to play less important things like their vacations.