JavaScript Tetris with source code you can tweet

A curious example of minimalism was demonstrated by the user GitHub with the nickname Aemkei.

The screenshot shows the famous Tetris game, on the right is its source code. The game can not rotate the figures, there is no scoring - but it boasts the size of a JS-code: less than 140 bytes.
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You can play here .

Github author with his comments.

UPD: Apparently, the author - Martin Kleppe - is busy with his favorite thing: he also has realizations of the game “Life” in JavaScript (140 bytes) and in Ruby (140 characters).