<s>
Puzzle	B-Application
Uo	I-Application
Poko	I-Application
is	O
a	O
visual	O
matching	O
game	O
in	O
which	O
one	O
player	O
or	O
two	O
co-operative	O
players	O
(	O
represented	O
by	O
cats	O
)	O
try	O
to	O
clear	O
the	O
screen	O
of	O
coloured	O
bubbles	O
in	O
order	O
to	O
progress	O
to	O
the	O
next	O
level	O
.	O
</s>
<s>
Puzzle	B-Application
Uo	I-Application
Poko	I-Application
was	O
solely	O
designed	O
by	O
Toshiaki	O
Tomizawa	O
,	O
a	O
co-founder	O
of	O
Cave	O
whose	O
previous	O
works	O
include	O
the	O
DonPachi	B-Application
series	O
.	O
</s>
<s>
Puzzle	B-Application
Uo	I-Application
Poko	I-Application
was	O
released	O
in	O
Japanese	O
arcades	O
by	O
Jaleco	O
in	O
February	O
1998	O
.	O
</s>
<s>
Unlike	O
several	O
other	O
releases	O
by	O
Cave	O
,	O
Uo	B-Application
Poko	I-Application
remained	O
exclusive	O
to	O
arcades	O
and	O
did	O
not	O
see	O
a	O
contemporary	O
port	O
for	O
a	O
home	O
console	O
.	O
</s>
<s>
In	O
Japan	O
,	O
Game	O
Machine	O
listed	O
Puzzle	B-Application
Uo	I-Application
Poko	I-Application
on	O
their	O
April	O
15	O
,	O
1998	O
issue	O
as	O
being	O
the	O
twenty-first	O
most-popular	O
arcade	O
game	O
at	O
the	O
time	O
.	O
</s>
