A minimal tetris clone

No score screen, no music, only tetris. The only thing this does better than some tetris clones is the ability to rotate piece at the side of the wall.

Some references I used:

• http://javilop.com/gamedev/tetris-tutorial-in-c-platform-independent-focused-in-game-logic-for-beginners/

• https://github.com/airfrog/pygame-tetris