Keep the board clean and aim for the highest score as much as possible. The core gameplay is jazzed up with the modern blue blocks and grids as an alternative for the classic woody interface style. ◉ Fabulous combination of block puzzle games & sudoku ◉ Dark mode/ Light mode feature ◉ Clear the lines & squares to score ◉ Beat your high score and challenge other players ◉ Simple, yet challenging - It’s hard to put this game down! ◉ Relaxing & brain training Carving out time and having a blast playing BLUE 81: SUDOKU BLOCK PUZZLE now for free!