<s>
Tower	B-Operating_System
of	I-Operating_System
Heaven	I-Operating_System
(	O
also	O
rendered	O
as	O
天国の塔	O
,	O
Tengoku	O
no	O
Tō	O
in	O
Japanese	O
)	O
is	O
a	O
2D	O
platform	O
game	O
developed	O
by	O
American	O
studio	O
Askiisoft	B-Application
.	O
</s>
<s>
The	O
game	O
was	O
built	O
in	O
GameMaker	B-Operating_System
,	O
and	O
was	O
released	O
for	O
Microsoft	B-Application
Windows	I-Application
in	O
2009	O
,	O
with	O
a	O
Flash	B-Operating_System
version	O
released	O
in	O
2010	O
.	O
</s>
<s>
In	O
Tower	B-Operating_System
of	I-Operating_System
Heaven	I-Operating_System
,	O
the	O
player	O
controls	O
Eid	O
,	O
a	O
silent	O
protagonist	O
with	O
a	O
large	O
,	O
onion-like	O
head	O
,	O
who	O
scales	O
the	O
Tower	B-Operating_System
of	I-Operating_System
Heaven	I-Operating_System
,	O
a	O
mysterious	O
monolith	O
that	O
promises	O
glory	O
to	O
those	O
who	O
scale	O
it	O
.	O
</s>
<s>
The	O
game	O
also	O
includes	O
a	O
speedrun	O
mode	O
,	O
where	O
you	O
are	O
timed	O
,	O
and	O
a	O
stage	O
editor	O
mode	O
for	O
the	O
Flash	B-Operating_System
browser	B-Protocol
version	O
,	O
where	O
you	O
can	O
create	O
and	O
play	O
your	O
own	O
stages	O
.	O
</s>
<s>
Tower	B-Operating_System
of	I-Operating_System
Heaven	I-Operating_System
's	O
soundtrack	O
,	O
composed	O
by	O
FlashyGoodness	O
,	O
and	O
graphical	O
style	O
are	O
heavily	O
influenced	O
by	O
the	O
Game	B-Device
Boy	I-Device
,	O
which	O
was	O
called	O
"	O
sly	O
and	O
deliberately	O
deceptive	O
"	O
to	O
hide	O
the	O
"	O
brutal	O
"	O
difficulty	O
.	O
</s>
<s>
Tower	B-Operating_System
of	I-Operating_System
Heaven	I-Operating_System
received	O
positive	O
reception	O
from	O
critics	O
.	O
</s>
<s>
Tower	B-Operating_System
of	I-Operating_System
Heaven	I-Operating_System
received	O
a	O
tribute	O
in	O
the	O
form	O
of	O
a	O
playable	O
stage	O
in	O
the	O
2011	O
platform	O
fighter	O
Super	B-Application
Smash	I-Application
Land	I-Application
and	O
its	O
2017	O
spiritual	O
successor	O
,	O
Rivals	B-Application
of	I-Application
Aether	I-Application
.	O
</s>
<s>
The	O
stages	O
feature	O
a	O
similar	O
"	O
law	O
"	O
mechanic	O
to	O
Tower	B-Operating_System
of	I-Operating_System
Heaven	I-Operating_System
,	O
where	O
players	O
who	O
do	O
not	O
obey	O
a	O
law	O
while	O
it	O
is	O
active	O
will	O
take	O
damage	O
.	O
</s>
