When all the necessary numbers are found, Mondo then uses Catherine to solve the puzzle and complete the request. Catherine can be connected to anything from inanimate objects to living people through the use of jacks: when the correct jack has been connected, the player then inputs the number sequence. If correct, the player gains a "Hit" and the puzzle is completed, but a "Blank" means that the player has the incorrect answer. If the player fails at a puzzle, they can start over again once a countdown timer has elapsed. At the beginning of the game, Mondo is given a guidebook to the island, which acts as a means for the player to document environmental and dialogue clues.