Mermaid Sudoku is a great Sudoku games for those who are new to Sudoku and would prefer images to number. The game plays the same…Mermaid Sudoku is a great Sudoku games for those who are new to Sudoku and would prefer images to number. The game plays the same way, Make sure that no row, column, or 3x3 square has more than one of the same sea creature. Want to learn to play Sudoku? Watch the tutorial video I've created.