Do you like video games? lots of people
do. there are many types of video games.
some people like action games. other
people like driving games. but the most
popular game of all time is a puzzle game.
tetris is a game about making lines. blocks
fall from the top of the screen. they fall
one at a time. the player moves the blocks.
once the blocks hit the bottom, they are
locked in place. players try to make lines
go across the screen with no gaps.
complete lines disappear. this gives
players more room. the blocks pile up
during the game. the game ends when the
blocks get to the top of the screen.
a man named alexey made tetris in 1984.
all the pieces in tetris have four blocks.
the word "tetra" means four. alexey
named his game after tetra and tennis. he
made tetris while working at a science
academy in moscow. moscow is in russia.
alexey made his game on a screen that
only showed letters. he could not use
blocks. the blocks were made out of letters
in the first game of tetris. still, all alexey's
friends loved his game. it was easy to learn
and fun to play.
soon the game spread across the world. it
was on every computer. it was in arcades. it
came with every one of nintendo's game
boy. more than 100 million game boys
were sold. tetris was all over the place.
even today tetris comes with many
phones.
dr. richard haier has studied tetris
players. he ran many tests. he found that
playing tetris boosts mental activity. dr.
haier thinks tetris is good for the brain. i
agree with this finding. now go and play
some tetris. it's just what the doctor
ordered

how did being included with nintendo's game boy tetris become successful? refer to the
text in your answer. explain in 1 paragraph