The Soviet Academy of Sciences in Moscow is out to win the hearts and minds of the computer literati of the West with a game called Tetris which was written by an 18-year-old on an IBM Personal has been a big hit throughout the Comecon countries: the game, which has nine levels of difficulty, involves lining up a series of falling blocks before they fill the screen: Reuters reports that versions are planned for nine popular computers, at $14 to $35, and games software distributor Mirrorsoft Ltd, here in London has versions for MS-DOS, Amstrad CPC, PCW and Sinclair Spectrum, Atari ST, Acorn BBC and Electron, Commodore 64 and Amiga, and MSX.