The original disk release of the game is protected with a dongle for in the joystick port and requires MSX-DOS 2 to run.
The authors wrote:
"This special version of TETRIS has been made on a MSX-TURBO R with HARD
DISK. If you try it on a MSX 2 PLUS you could note that it is slower than
usual when it loads from disk. DO NOT WORRY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
This is due to the great quantity of the packing data grafic.
For eventual problems that could be on your system configuration, consider
us always at your disposal."
There is also an MSX2 version and a level editor. On the MSX2 version you can use a Covox/SIMPL for sound effects.