a quiz game based on the Vigenère poly-alphabetic substitution cipher which has ninety messages to decrypt by answering six questions per message

by answering a question a letter in the cipher key is revealed, once all six questions have been answered correctly the message can be decrypted, be aware though, you will only have three attempts to crack the cipher key otherwise the message is lost

questions are split into six categories: music, movies, world, food, books and general knowledge

PLAYING A GAME
to play a game, tap the "play" button on the home page, when the game starts, the page will show the six question buttons, the cipher key values and the encrypted message, tap a question button to see the question and using the letter keys select the required letter

once all six questions have been answered the decrypt button will be shown, tapping the button will either decrypt the message or inform you that one or more letters are incorrect

the game ends once all six questions have been answered correctly and the message has been decrypted or three failed attempts have been made to decrypt the message

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