atari2600land has updated his single and two player simultaneous play variant of a very well known russian block game. The game was previously known as “Tetris”.

Release notes:

OK, I got the music working good now. left difficulty A turns it on while left difficulty B turns it off. In two-player mode, music is automatically off since I need AUD1 for player 2’s sfx. Thanks, RevEng!

http://www.atariage.com/forums/topic/153710-2600tris/page__st__25