From the back of the box The Puzzle Sensation That's Sweeping the Nation! Enhance your critical thinking skills with the addictive puzzle sensation, Sudoku! No matter what your age or skill level, Sudokumania will challenge your mind everywhere you go! Endless Gameplay! Auto-generating algorithm allows for an infinite number of puzzles! Touch Screen Control! Solve your puzzles faster and more accurately! 2 Player Versus Mode! Challenge your friends in a unique game of Sudoku! Customizable Gameplay! Switch between numbers or symbols or change the difficulty to adjust to your personal skill level!