It's like writing with a pen on paper. \r\nand the ease of playing the game. \r\nCustomizable Sudoku\r\n\r\nIt's a game, but you can play it as if you were writing with a pen on a piece of paper.\r\nYou can customize the assist function to your liking.\r\n\r\n-You can customize the assist function and play with your favorite settings.\r\n\r\nYou can customize the assist function to play with your favorite settings.\r\nWe want to keep the paper-and-pencil style, but make it easier to play...!\r\n\r\nYou can turn on/off various assist functions such as ...... to your liking.\r\n\r\n-The game can be played anytime, anywhere, even if it takes a long time.\r\n\r\n-There are a total of 300 problems in EASY, NORMAL and HARD difficulty levels.\r\nThere are 300 problems in three difficulty levels: EASY, NORMAL and HARD.