<s>
The	O
game	O
was	O
developed	O
by	O
Masanobu	O
Endō	O
,	O
who	O
previously	O
developed	O
Xevious	B-Application
and	O
The	B-Application
Tower	I-Application
of	I-Application
Druaga	I-Application
,	O
and	O
his	O
company	O
Game	O
Studio	O
.	O
</s>
<s>
A	O
sequel	O
titled	O
Family	B-Application
Circuit	I-Application
'	O
91	O
was	O
released	O
for	O
the	O
Family	O
Computer	O
in	O
1991	O
,	O
while	O
a	O
second	O
sequel	O
,	O
Super	O
Family	B-Application
Circuit	I-Application
was	O
released	O
for	O
the	O
Super	B-Application
Famicom	I-Application
in	O
1994	O
.	O
</s>
