MastermindDS

Gusec has posted an entry into the Neoflash Coding Contest;

http://img99.imageshack.us/img99/4678/showoffzx8.png

It's a Mastermind-game for the Nintendo DS.
It includes 3 different levels of difficulty, HighScore and some challenge.
The game is made for DS in book-form, and I've included instructions on how to play, just press the little question-mark in the corner when the selection screen appears!

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The game is great, and I absolutely love Mastermind in general, but I've got 2 question.

First, does anyone know the secret and second, what is that on the left screen during the game?