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:

Thanks for the suggestions. I fixed the code a little pertaining to movement. The block can now flip while moving left and right, but still can’t flip when moving left+down or right+down. I don’t know why this is. As for the locking too fast, I don’t know if I’m able to do something about this. The way the code is now, it moves down, and if there is playfield below it, it waits for the speed movement variable to pass the timer variable and then goes to the line detecting sequence. Hope this helps, and if not, tell me so I can fiddle around with the code some more.

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