Version 2.0.0 is a major update with the following new features and improvements:<br>- New Abyss difficulty, the hardest tier yet.<br>- Sign in with Google Play Games and sync your progress across devices.<br>- Global leaderboards to compete with players worldwide.<br>- Achievements to earn as you play.<br>- Daily and weekly challenges.<br>- Earn coins through play and unlock new themes.<br>- New
Only the current version so far — new entries appear as the game ships updates.
Sudoku number puzzles for brain training, with daily challenges and smart hints.
