Sudoku-NBP Arduboy game -- http://community.arduboy.com/t/sudoku-nbp-arduboy-game/1713
Quick video: https://youtu.be/yv1QMtOkOBw
Play Sudoku on your Arduboy. Includes 45 puzzles (easy, medium, hard) and allows custom puzzles to be entered manually or via serial input. Four players or puzzles can be save and restored from non-volatile memory (EEPROM).
Game play includes Hints (a free move), Notes (dots showing choice set 1..9) and Solve puzzle.
Enjoy, -NBP
Uses the standard Arduboy library. See quickstart guide for library download -- http://community.arduboy.com/t/kickstarter-quick-start-guide/725