<s>
Rohrer	O
has	O
described	O
the	O
title	O
as	O
a	O
"	O
memento	B-Application
mori	I-Application
"	O
game	O
.	O
</s>
<s>
In	O
form	O
,	O
Passage	O
most	O
resembles	O
a	O
primitive	O
side-scroller	O
in	O
which	O
players	O
control	O
a	O
male	O
avatar	B-Application
that	O
can	O
move	O
from	O
left	O
to	O
right	O
as	O
time	O
progresses	O
.	O
</s>
<s>
As	O
the	O
game	O
progresses	O
,	O
the	O
avatar	B-Application
's	O
relative	O
position	O
on	O
the	O
screen	O
gradually	O
shifts	O
to	O
the	O
right	O
,	O
with	O
less	O
visibility	O
to	O
the	O
right	O
and	O
more	O
visibility	O
to	O
the	O
left	O
.	O
</s>
<s>
The	O
speed	O
of	O
the	O
player	O
also	O
slows	O
as	O
time	O
progresses	O
,	O
and	O
the	O
representation	O
of	O
both	O
the	O
avatar	B-Application
and	O
the	O
wife	O
visibly	O
age	O
.	O
</s>
<s>
The	O
size	O
constraints	O
for	O
Gamma	O
256	O
led	O
Rohrer	O
to	O
present	O
the	O
game	O
in	O
a	O
blocky	O
100x16	O
pixel	O
resolution	B-Algorithm
.	O
</s>
<s>
In	O
2007	O
Rohrer	O
released	O
the	O
game	O
's	O
source	O
code	O
and	O
assets	O
into	O
the	O
public	O
domain	O
,	O
while	O
asking	O
for	O
voluntary	O
donations	O
(	O
Donationware	B-License
)	O
and	O
selling	O
the	O
game	O
on	O
the	O
iOS	B-Application
appstore	O
for	O
$0.99	O
.	O
</s>
<s>
At	O
the	O
2007	O
Montreal	O
International	O
Games	O
Summit	O
,	O
Passage	O
was	O
one	O
of	O
eight	O
submitted	O
entrants	O
that	O
were	O
screened	O
at	O
Kokoromi	O
's	O
Gamma	O
256	O
show	O
,	O
a	O
competition	O
that	O
asked	O
designers	O
to	O
create	O
a	O
game	O
in	O
70	O
days	O
that	O
used	O
as	O
low	O
a	O
resolution	B-Algorithm
and	O
as	O
unusual	O
an	O
aspect	O
ratio	O
as	O
possible	O
.	O
</s>
