To Play:
• Click on an iKon in the bar at the top of the game then click on the board to place it.
• You can place the same iKon again by clicking again on the board.
• Incorrect moves are ignored.

As with traditional Sudoku, the goal is to guess the iKon in each spot using logic: Each iKon appears once in each row, once in each column, and once in each shaded 3x3 section.

How the iPhone Game differs from the Demo:
• Settings interface that allows you to change iKons, background and difficulty level.
• Unlimited automatically-generated puzzles.
• Five iKon sets, including two different sets of digits for traditional play.
• Two board styles, white marble and glossy black, to suit taste and viewing conditions.
• On the two easier levels, wrong moves are signaled with a 'X' that fades away.
• On the two harder levels, wrong moves are silently accepted.