Hi guys, this is not a question but rather a promotion… Inspired by this developer (https://groups.google.com/forum/#!searchin/personal-kdbplus/game/personal-kdbplus/N1T7QmJZLJc/4Vxx5abjW8oJ), I developed a MasterMind game using Q and published it under http://code.kx.com/wiki/Contrib#AquaQ\_Analytics.
If you are interested, please do take a look and any feedback are welcome! Enjoy!