Pull Request now includes Tetris!

completed: warmups
tower of Hanoi (with saving via YAML)
Mastermind(no saving, but yes AI)

Single block Tetris, with high scores saved, plus a difficulty setting as well. (Boring under about level 8).
I noticed that this method was double counting values - for example, if the guess had four 'a's and the code had only one 'a', then it would count all four entries in the guess as either correct or wrong position.