atari2600land has updated his single and two player simultaneous play variant of a very well known Russian block game.

Release notes:

Hi all. There was a bug about getting 100 or more lines and affected the playfield. I think i fixed it. I also went ahead and made it so before you get a line cleared it goes much quicker. As usual, tell me if there’s any bugs.

http://www.atariage.com/forums/topic/153710-2600tris/page__st__150