Tetris (Electronika 60)

Tetris for the Electronika 60, the original creation which Alexey Pajitnov programmed in Pascal on an Electronika 60 computer, features black and white (or green, depending on the computer) graphics, with a pair of brackets representing each block in a tetromino. A player controls input through the number pad, and there are greater/less than/slashes and lines outlining the playfield.

There is absolutely no trace of this anywhere online at all.

You need to know some Russian to understand this game. The translations are as follows:
 * 7: Left
 * 9: Right
 * 8: Rotate
 * 4: Change level
 * 5: Restart
 * 1: Show/hide next
 * 0: Exit

The text in the upper left corner translates to "lines" "level" and "score" from top to bottom.