Puzzle games, especially those of the logic variety, always seem to default to using numbers to provide challenge. But what if you don't like numbers? What if you spend your days scrawling anti-mathematical propaganda on walls as you fight Big Brother's oppressive numerical order? If that sounds like you, we first of all would like to salute you for living in a dystopian sci-fi novel. Then we'd like to show you FlowDoku, a free sudoku game by HapaFive for mobile devices that uses shapes instead of numbers.