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).
This all works well, and while a lot of the game play logic could be extracted into the TowerOfHanoi class, I've already mentioned that a bit above.  Also the mechanics to make a move are a bit tough (user has to enter an array), but you already addressed that with Andur's comment below