<s>
Flappy	B-Application
Bird	I-Application
is	O
a	O
mobile	B-Application
game	I-Application
developed	O
by	O
the	O
Vietnamese	O
video	O
game	O
artist	O
and	O
programmer	O
Dong	O
Nguyen	O
(	O
)	O
,	O
under	O
his	O
game	O
development	O
company	O
.Gears	O
.	O
</s>
<s>
Nguyen	O
created	O
the	O
game	B-Application
over	I-Application
the	O
period	O
of	O
several	O
days	O
,	O
using	O
a	O
bird	O
protagonist	O
that	O
he	O
had	O
designed	O
for	O
a	O
cancelled	O
game	O
in	O
2012	O
.	O
</s>
<s>
Flappy	B-Application
Bird	I-Application
received	O
poor	O
reviews	O
from	O
some	O
critics	O
,	O
who	O
criticized	O
its	O
high	O
level	O
of	O
difficulty	O
and	O
alleged	O
plagiarism	O
in	O
graphics	O
and	O
game	O
mechanics	O
,	O
while	O
other	O
reviewers	O
found	O
it	O
addictive	O
.	O
</s>
<s>
At	O
the	O
end	O
of	O
January	O
2014	O
,	O
it	O
was	O
the	O
most	O
downloaded	O
free	O
game	O
in	O
the	O
App	B-Application
Store	I-Application
for	O
iOS	B-Application
.	O
</s>
<s>
During	O
this	O
period	O
,	O
its	O
developer	O
said	O
that	O
Flappy	B-Application
Bird	I-Application
was	O
earning	O
$	O
50,000	O
a	O
day	O
from	O
in-app	O
advertisements	O
as	O
well	O
as	O
sales	O
.	O
</s>
<s>
Flappy	B-Application
Bird	I-Application
was	O
removed	O
from	O
both	O
the	O
App	B-Application
Store	I-Application
and	O
Google	B-Application
Play	I-Application
on	O
February	O
10	O
,	O
2014	O
,	O
with	O
Nguyen	O
claiming	O
that	O
he	O
felt	O
guilty	O
over	O
what	O
he	O
considered	O
to	O
be	O
the	O
game	O
's	O
addictive	O
nature	O
and	O
overusage	O
.	O
</s>
<s>
Games	O
similar	O
to	O
Flappy	B-Application
Bird	I-Application
became	O
popular	O
on	O
the	O
iOS	B-Application
App	I-Application
Store	I-Application
in	O
the	O
wake	O
of	O
its	O
removal	O
,	O
and	O
both	O
Apple	O
and	O
Google	B-Application
have	O
removed	O
games	O
from	O
their	O
app	B-Application
stores	I-Application
for	O
being	O
too	O
similar	O
to	O
the	O
original	O
game	O
.	O
</s>
<s>
In	O
August	O
2014	O
,	O
a	O
revised	O
version	O
of	O
Flappy	B-Application
Bird	I-Application
,	O
called	O
Flappy	B-Application
Birds	I-Application
Family	I-Application
,	O
was	O
released	O
exclusively	O
for	O
the	O
Amazon	B-Application
Fire	I-Application
TV	I-Application
.	O
</s>
<s>
Bay	O
Tek	O
Games	O
also	O
released	O
a	O
licensed	O
coin-operated	O
Flappy	B-Application
Bird	I-Application
arcade	O
game	O
.	O
</s>
<s>
Flappy	B-Application
Bird	I-Application
is	O
an	O
arcade-style	O
game	O
in	O
which	O
the	O
player	O
controls	O
the	O
bird	O
Faby	O
,	O
which	O
moves	O
persistently	O
to	O
the	O
right	O
.	O
</s>
<s>
Faby	O
automatically	O
descends	O
and	O
only	O
ascends	O
when	O
the	O
player	O
taps	O
the	O
touchscreen	B-Device
.	O
</s>
<s>
During	O
the	O
game	B-Application
over	I-Application
screen	O
,	O
the	O
player	O
is	O
awarded	O
a	O
bronze	O
medal	O
if	O
they	O
reached	O
ten	O
or	O
more	O
points	O
,	O
a	O
silver	O
medal	O
from	O
twenty	O
points	O
,	O
a	O
gold	O
medal	O
from	O
thirty	O
points	O
,	O
and	O
a	O
platinum	O
medal	O
from	O
forty	O
points	O
.	O
</s>
<s>
He	O
discovered	O
video	O
games	O
by	O
playing	O
Super	B-Application
Mario	I-Application
Bros	I-Application
.	I-Application
as	O
a	O
child	O
and	O
began	O
coding	O
his	O
own	O
at	O
age	O
16	O
.	O
</s>
<s>
While	O
using	O
the	O
iPhone	B-Operating_System
,	O
he	O
found	O
that	O
its	O
most	O
popular	O
games	O
such	O
as	O
Angry	B-Application
Birds	I-Application
were	O
too	O
complicated	O
,	O
and	O
wanted	O
to	O
make	O
a	O
simpler	O
game	O
for	O
people	O
who	O
are	O
"	O
always	O
on	O
the	O
move	O
"	O
.	O
</s>
<s>
Flappy	B-Application
Bird	I-Application
was	O
created	O
and	O
developed	O
by	O
Nguyen	O
in	O
two	O
to	O
three	O
days	O
.	O
</s>
<s>
The	O
gameplay	O
was	O
inspired	O
by	O
the	O
act	O
of	O
bouncing	O
a	O
ping	O
pong	B-Application
ball	O
against	O
a	O
paddle	O
for	O
as	O
long	O
as	O
possible	O
.	O
</s>
<s>
Flappy	B-Application
Bird	I-Application
was	O
originally	O
released	O
on	O
May	O
24	O
,	O
2013	O
,	O
with	O
support	O
for	O
the	O
iPhone	B-Operating_System
5	I-Operating_System
.	O
</s>
<s>
The	O
game	O
was	O
subsequently	O
updated	O
for	O
iOS	B-Operating_System
7	I-Operating_System
in	O
September	O
2013	O
.	O
</s>
<s>
In	O
January	O
2014	O
,	O
it	O
topped	O
the	O
Free	O
Apps	O
chart	O
in	O
the	O
US	O
and	O
Chinese	O
App	B-Application
Stores	I-Application
,	O
and	O
later	O
that	O
month	O
topped	O
the	O
same	O
section	O
of	O
the	O
UK	O
App	B-Application
Store	I-Application
where	O
it	O
was	O
touted	O
as	O
"	O
the	O
new	O
Angry	B-Application
Birds	I-Application
"	O
.	O
</s>
<s>
It	O
ended	O
January	O
as	O
the	O
most	O
downloaded	O
App	O
on	O
the	O
App	B-Application
Store	I-Application
.	O
</s>
<s>
The	O
Android	B-Application
version	O
of	O
Flappy	B-Application
Bird	I-Application
was	O
released	O
to	O
the	B-Application
Google	I-Application
Play	O
store	O
on	O
January	O
30	O
,	O
2014	O
.	O
</s>
<s>
On	O
February	O
8	O
,	O
2014	O
,	O
Nguyen	O
announced	O
on	O
Twitter	B-Application
that	O
the	O
game	O
would	O
be	O
removed	O
from	O
both	O
Apple	B-Application
's	I-Application
App	I-Application
Store	I-Application
and	O
Google	B-Application
Play	I-Application
,	O
writing	O
:	O
"	O
I	O
am	O
sorry	O
'	O
Flappy	B-Application
Bird	I-Application
 '	O
users	O
,	O
22	O
hours	O
from	O
now	O
,	O
I	O
will	O
take	O
'	O
Flappy	B-Application
Bird	I-Application
 '	O
down	O
.	O
</s>
<s>
The	O
game	O
was	O
removed	O
from	O
both	O
the	O
App	B-Application
Store	I-Application
and	O
Google	B-Application
Play	I-Application
exactly	O
on	O
time	O
,	O
much	O
to	O
the	O
dismay	O
of	O
many	O
fans	O
.	O
</s>
<s>
Tuoi	O
Tre	O
News	O
,	O
the	O
English-language	O
edition	O
of	O
the	O
Vietnamese	O
newspaper	O
,	O
reported	O
from	O
a	O
local	O
technology	O
expert	O
that	O
Flappy	B-Application
Birds	I-Application
removal	O
could	O
have	O
been	O
due	O
to	O
a	O
legal	O
challenge	O
from	O
Nintendo	O
over	O
perceived	O
visual	O
similarities	O
to	O
the	O
Mario	B-Application
games	O
.	O
</s>
<s>
Following	O
the	O
removal	O
,	O
many	O
media	O
outlets	O
reported	O
that	O
several	O
merchants	O
on	O
eBay	B-Application
were	O
offering	O
phones	O
which	O
had	O
the	O
app	O
pre-installed	O
for	O
US$	O
1,499	O
or	O
more	O
,	O
with	O
some	O
receiving	O
bids	O
of	O
over	O
$	O
90,000	O
;	O
however	O
,	O
the	O
listings	O
were	O
removed	O
for	O
violating	O
eBay	B-Application
's	O
rule	O
stating	O
that	O
smartphones	O
must	O
be	O
restored	O
to	O
factory	O
settings	O
before	O
being	O
sold	O
.	O
</s>
<s>
In	O
an	O
interview	O
with	O
Forbes	O
,	O
Nguyen	O
cited	O
the	O
game	O
's	O
addictive	O
nature	O
for	O
its	O
cancellation	O
,	O
stating	O
:	O
"	O
Flappy	B-Application
Bird	I-Application
was	O
designed	O
to	O
play	O
in	O
a	O
few	O
minutes	O
when	O
you	O
are	O
relaxed	O
.	O
</s>
<s>
To	O
solve	O
that	O
problem	O
,	O
it	O
's	O
best	O
to	O
take	O
down	O
Flappy	B-Application
Bird	I-Application
.	O
</s>
<s>
In	O
a	O
March	O
2014	O
interview	O
with	O
Rolling	O
Stone	O
,	O
Nguyen	O
refused	O
to	O
rule	O
out	O
re-releasing	O
Flappy	B-Application
Bird	I-Application
,	O
on	O
condition	O
that	O
it	O
would	O
come	O
with	O
a	O
warning	O
to	O
"	O
Take	O
a	O
break	O
"	O
.	O
</s>
<s>
On	O
March	O
19	O
,	O
he	O
announced	O
via	O
Twitter	B-Application
that	O
the	O
game	O
will	O
be	O
rereleased	O
onto	O
App	B-Application
Stores	I-Application
,	O
but	O
not	O
any	O
time	O
soon	O
.	O
</s>
<s>
As	O
Nguyen	O
had	O
promised	O
,	O
August	O
2014	O
saw	O
a	O
revised	O
version	O
of	O
Flappy	B-Application
Bird	I-Application
,	O
called	O
Flappy	B-Application
Birds	I-Application
Family	I-Application
,	O
released	O
exclusively	O
through	O
the	O
Amazon	O
Appstore	B-Application
for	O
the	O
Amazon	B-Application
Fire	I-Application
TV	I-Application
platform	O
.	O
</s>
<s>
Flappy	B-Application
Bird	I-Application
received	O
"	O
mixed	O
or	O
average	O
reviews	O
"	O
from	O
critics	O
,	O
holding	O
a	O
Metacritic	O
score	O
of	O
52/100	O
,	O
based	O
on	O
seven	O
reviews	O
.	O
</s>
<s>
According	O
to	O
its	O
creator	O
,	O
the	O
game	O
is	O
slightly	O
easier	O
on	O
Android	B-Application
devices	O
than	O
on	O
iOS	B-Application
.	O
</s>
<s>
Nolan	O
Bushnell	O
,	O
the	O
creator	O
of	O
the	O
video	O
game	O
Pong	B-Application
,	O
compared	O
Flappy	B-Application
Bird	I-Application
to	O
his	O
own	O
game	O
by	O
claiming	O
that	O
"	O
simple	O
games	O
are	O
more	O
satisfying	O
"	O
.	O
</s>
<s>
John	O
Romero	O
,	O
a	O
co-creator	O
of	O
the	O
classic	O
first-person	O
shooter	O
Doom	B-Application
,	O
commented	O
that	O
Flappy	B-Application
Bird	I-Application
is	O
"	O
a	O
reaction	O
against	O
prevailing	O
design	O
the	O
way	O
grunge	O
was	O
a	O
reaction	O
to	O
metal.	O
"	O
</s>
<s>
When	O
questioned	O
at	O
the	O
time	O
by	O
Chocolate	O
Lab	O
Apps	O
,	O
a	O
website	O
for	O
app	O
developers	O
,	O
Nguyen	O
claimed	O
to	O
have	O
used	O
no	O
promotional	O
methods	O
in	O
the	O
marketing	O
of	O
Flappy	B-Application
Bird	I-Application
.	O
</s>
<s>
The	O
game	O
was	O
criticised	O
by	O
Kotaku	O
for	O
what	O
it	O
claimed	O
was	O
open	O
use	O
of	O
Mario-style	O
graphics	O
,	O
referring	O
to	O
it	O
as	O
"	O
ripped-off	O
art	O
"	O
.	O
</s>
<s>
According	O
to	O
some	O
Vietnamese	O
newspapers	O
,	O
including	O
Thanh	O
Niên	O
and	O
BBC	O
Vietnamese	O
,	O
Flappy	B-Application
Bird	I-Application
is	O
very	O
similar	O
to	O
a	O
game	O
released	O
in	O
2011	O
(	O
two	O
years	O
before	O
Flappy	B-Application
Bird	I-Application
)	O
called	O
Piou	O
Piou	O
vs.	O
Cactus	O
,	O
from	O
the	O
gameplay	O
(	O
by	O
tapping	O
on	O
the	O
screen	O
)	O
to	O
the	O
main	O
character	O
design	O
(	O
a	O
small	O
yellow	O
bird	O
with	O
big	O
red	O
beak	O
)	O
to	O
the	O
obstacles	O
(	O
green	O
cacti	O
and	O
pipes	O
)	O
.	O
</s>
<s>
It	O
is	O
reported	O
that	O
several	O
French	O
newspapers	O
such	O
as	O
20	O
Minutes	O
and	O
Metronews	O
accused	O
Flappy	B-Application
Bird	I-Application
of	O
being	O
a	O
clone	O
.	O
</s>
<s>
The	O
French	O
developer	O
of	O
Piou	O
Piou	O
vs.	O
Cactus	O
,	O
known	O
as	O
Kek	O
,	O
told	O
Pocket	O
Gamer	O
that	O
he	O
,	O
too	O
,	O
noticed	O
that	O
Flappy	B-Application
Bird	I-Application
is	O
"	O
very	O
similar	O
"	O
to	O
his	O
earlier	O
game	O
,	O
but	O
when	O
he	O
contacted	O
Nguyen	O
about	O
it	O
,	O
Nguyen	O
claimed	O
that	O
he	O
did	O
not	O
know	O
anything	O
.	O
</s>
<s>
Technology	O
editor	O
Patrick	O
O'Rourke	O
of	O
Canada.com	O
also	O
charged	O
that	O
Flappy	B-Application
Bird	I-Application
is	O
"	O
almost	O
a	O
complete	O
ripoff	O
"	O
of	O
Piou	O
Piou	O
vs	O
Cactus	O
,	O
as	O
well	O
as	O
that	O
its	O
primary	O
gameplay	O
mechanic	O
is	O
a	O
"	O
rip	O
off	O
"	O
from	O
a	O
game	O
called	O
Helicopter	O
Game	O
,	O
and	O
that	O
it	O
heavily	O
borrowed	O
sound	O
effects	O
from	O
Super	B-Application
Mario	I-Application
Bros	I-Application
.	I-Application
games	O
.	O
</s>
<s>
Since	O
the	O
game	O
's	O
removal	O
,	O
numerous	O
remakes	O
and	O
parodies	O
have	O
been	O
spawned	O
,	O
such	O
as	O
Sesame	B-Application
Street	I-Application
's	O
Flappy	O
Bert	O
and	O
Fall	O
Out	O
Boy	O
's	O
Fall	O
Out	O
Bird	O
.	O
</s>
<s>
Flappy	B-Application
Bird	I-Application
became	O
one	O
of	O
the	O
most	O
cloned	O
games	O
in	O
Apple	B-Application
's	I-Application
App	I-Application
Store	I-Application
.	O
</s>
<s>
At	O
the	O
peak	O
of	O
its	O
popularity	O
,	O
over	O
60	O
clones	O
per	O
day	O
were	O
appearing	O
on	O
the	O
App	B-Application
Store	I-Application
,	O
prompting	O
both	O
Google	B-Application
and	O
Apple	O
to	O
begin	O
rejecting	O
games	O
with	O
the	O
word	O
"	O
Flappy	O
"	O
in	O
the	O
name	O
.	O
</s>
<s>
CNET	O
reviewed	O
seven	O
"	O
Flappy	O
copycats	O
"	O
for	O
iOS	B-Application
two	O
days	O
after	O
the	O
original	O
game	O
's	O
removal	O
,	O
describing	O
the	O
options	O
as	O
"	O
pretty	O
bleak	O
"	O
,	O
but	O
singling	O
out	O
the	O
underwater	O
Splashy	B-Application
Fish	I-Application
as	O
the	O
closest	O
approximation	O
of	O
Flappy	B-Application
Bird	I-Application
.	O
</s>
<s>
Shortly	O
after	O
the	O
game	O
's	O
removal	O
,	O
security	O
researchers	O
warned	O
that	O
some	O
versions	O
of	O
Flappy	B-Application
Bird	I-Application
and	O
its	O
imitators	O
available	O
on	O
alternative	O
Android	B-Application
app	I-Application
stores	I-Application
have	O
been	O
found	O
to	O
contain	O
malware	O
that	O
can	O
lead	O
to	O
unauthorised	O
charges	O
to	O
a	O
user	O
's	O
phone	O
bills	O
.	O
</s>
<s>
The	O
number	O
matching	O
game	O
Threes	B-Application
has	O
been	O
compared	O
to	O
Flappy	B-Application
Bird	I-Application
because	O
of	O
the	O
similarities	O
between	O
how	O
people	O
react	O
to	O
them	O
and	O
by	O
the	O
chain	O
of	O
clones	O
that	O
they	O
are	O
both	O
respectively	O
part	O
of	O
.	O
</s>
<s>
In	O
February	O
2014	O
,	O
the	O
non-profit	O
computer	O
science	O
education	O
organization	O
Code.org	O
unveiled	O
a	O
set	O
of	O
lessons	O
that	O
would	O
allow	O
the	O
student	O
to	O
make	O
their	O
own	O
Flappy	B-Application
Bird	I-Application
clone	O
.	O
</s>
<s>
Nguyen	O
's	O
other	O
games	O
Super	O
Ball	O
Juggling	O
and	O
Shuriken	O
Block	O
ranked	O
at	O
6th	O
and	O
18th	O
respectively	O
on	O
the	O
App	B-Application
Store	I-Application
during	O
early	O
February	O
2014	O
on	O
the	O
back	O
of	O
Flappy	B-Application
Bird	I-Application
success	O
.	O
</s>
<s>
One	O
of	O
those	O
games	O
was	O
released	O
in	O
2014	O
as	O
Swing	B-Application
Copters	I-Application
and	O
uses	O
similar	O
gameplay	O
as	O
Flappy	B-Application
Bird	I-Application
.	O
</s>
<s>
An	O
Easter	O
egg	O
in	O
Android	B-Application
Lollipop	I-Application
(	O
version	O
5.0/5.1	O
)	O
allows	O
users	O
to	O
play	O
a	O
modified	O
version	O
of	O
Flappy	B-Application
Bird	I-Application
,	O
entitled	O
"	O
L	O
Land	O
"	O
,	O
involving	O
a	O
flying	O
Android	B-Application
and	O
Lollipops	B-Application
replacing	O
the	O
pipes	O
.	O
</s>
<s>
It	O
was	O
revamped	O
in	O
Android	B-Application
Marshmallow	I-Application
(	O
version	O
6.0	O
)	O
as	O
"	O
Marshmallow	B-Application
Land	O
"	O
,	O
adding	O
multiplayer	O
support	O
for	O
up	O
to	O
6	O
players	O
.	O
</s>
<s>
On	O
New	O
Year	O
's	O
Eve	O
in	O
2014	O
,	O
Google	B-Application
displayed	O
an	O
animated	O
Google	B-Application
Doodle	O
featuring	O
Flappy	B-Application
Bird	I-Application
as	O
one	O
of	O
the	O
year	O
's	O
most	O
searched	O
phenomena	O
,	O
alongside	O
the	O
World	B-Application
Cup	I-Application
,	O
the	O
Ice	O
Bucket	O
Challenge	O
and	O
the	O
Philae	O
spacecraft	O
.	O
</s>
<s>
A	O
similar	O
game	O
featuring	O
Talking	O
Tom	O
was	O
released	O
as	O
a	O
mini-game	O
for	O
My	B-Application
Talking	I-Application
Tom	I-Application
,	O
called	O
Flappy	O
Tom	O
,	O
and	O
the	O
same	O
game	O
was	O
featured	O
in	O
Talking	O
Tom	O
and	O
Friends	O
.	O
</s>
<s>
In	O
2016	O
,	O
Flappy	B-Application
Bird	I-Application
was	O
replicated	O
within	O
Super	B-Application
Mario	I-Application
World	I-Application
through	O
code	O
injection	O
.	O
</s>
