few notes:

the control scheme is very inconsistent, sometimes it behaves like traditional tetris, others like modern. rotations are inconsistent, as are locks,

also I've seen vertical duplication a lot of times, which makes strategic play hard.

it's also not picking the pieces correctly, real tetris shuffles a bag of all seven pieces, so repeats are spread out and you’ll never get three of the same in a row, here I've had 5 `I` pieces in a row :-/