I really enjoyed this review, too, because I'd heard how bad Hatris was. Apparently even the worker power-ups on the NES are nearly useless!
The only inaccuracy I found is that Pajitnov wrote Welltris(1989) before Hatris(1990), 3 years after Tetris(1986.) Welltris was pretty lame, too, incidentally.
But his weakest effort is Knight Move. If you hated Hatris, you'll loathe Knight Move. Unfortunately, it's not even good enough to write a fun bash review about. He's written some better games since then, but it's interesting how he went into a slump for a while after Tetris.
My principal said, 'Emo, Emo, Emo.'
I said 'I'm the one in the middle, you lousy drunk!'
-- Emo Phillips