• Easy level: The image consists of 9 pieces. Time 2 minutes countdown.
• Difficult level: The image consists of 12 pieces. Time 5 minutes countdown.
• The image is made out of randomly mixed pieces.
• The blank piece of the puzzle appears more transparent than the rest.
• The user chooses the piece he/she thinks that it should be put into the place of the blank piece.
• Only the pieces next to the blank one can change position.
• The fewer moves the user makes and the sooner he/she finishes the game, the higher the score he/she achieves.

Threshold record: 80/100