<s>
Stencyl	B-Application
is	O
a	O
video	O
game	O
development	O
tool	O
that	O
allows	O
users	O
to	O
create	O
2D	O
video	O
games	O
for	O
computers	O
,	O
mobile	O
devices	O
,	O
and	O
the	O
web	O
.	O
</s>
<s>
The	O
software	O
was	O
originally	O
called	O
"	O
StencylWorks	B-Application
"	O
while	O
in	O
development	O
and	O
for	O
the	O
initial	O
release	O
but	O
was	O
later	O
shortened	O
to	O
just	O
"	O
Stencyl	B-Application
"	O
.	O
</s>
<s>
Games	O
created	O
in	O
Stencyl	B-Application
can	O
be	O
exported	O
to	O
the	O
web	O
via	O
Adobe	B-Operating_System
Flash	I-Operating_System
Player	I-Operating_System
or	O
HTML5	B-Application
,	O
and	O
to	O
personal	O
computers	O
as	O
executable	B-Application
games	O
,	O
as	O
well	O
as	O
onto	O
various	O
mobile	O
devices	O
as	O
iOS	B-Application
and	O
Android	B-Application
applications	I-Application
.	O
</s>
<s>
Physics	O
and	O
collisions	O
are	O
managed	O
by	O
Box2D	B-Application
,	O
which	O
can	O
be	O
selectively	O
or	O
completely	O
disabled	O
to	O
decrease	O
any	O
potential	O
performance	O
impact	O
for	O
games	O
that	O
do	O
n't	O
require	O
full	O
physics	O
simulation	O
.	O
</s>
<s>
Starting	O
in	O
version	O
3.0	O
,	O
projects	O
in	O
Stencyl	B-Application
use	O
the	O
Haxe	B-Language
programming	O
language	O
and	O
OpenFL	B-Application
game	O
framework	O
to	O
allow	O
a	O
flexible	O
,	O
write	O
once	O
,	O
run	O
anywhere	O
style	O
of	O
game	O
creation	O
.	O
</s>
<s>
Stencyl	B-Application
is	O
an	O
authoring	B-Application
tool	I-Application
and	O
an	O
IDE	B-Application
.	O
</s>
<s>
The	O
Tileset	O
Editor	O
is	O
used	O
to	O
import	O
and	O
edit	O
tilesets	B-Application
,	O
including	O
their	O
collision	O
shapes	O
,	O
appearance	O
,	O
and	O
animations	O
.	O
</s>
<s>
The	O
Scene	O
Designer	O
is	O
used	O
to	O
create	O
and	O
edit	O
levels	O
and	O
game	O
states	O
(	O
Scenes	O
)	O
by	O
using	O
actors	O
,	O
tilesets	B-Application
,	O
and	O
behaviors	O
.	O
</s>
<s>
Additional	O
tools	O
permit	O
the	O
user	O
to	O
import	O
images	O
for	O
use	O
as	O
foregrounds	O
and	O
backgrounds	O
in	O
scenes	O
,	O
import	O
and	O
edit	O
fonts	O
,	O
import	O
sounds	O
and	O
music	O
files	O
(	O
MP3	B-Application
and	O
OGG	B-Algorithm
are	O
supported	O
,	O
depending	O
on	O
the	O
export	O
target	O
)	O
,	O
and	O
alter	O
game	O
settings	O
such	O
as	O
player	O
controls	O
and	O
game	O
resolution	O
.	O
</s>
<s>
A	O
library	O
of	O
common	O
behaviors	O
is	O
included	O
with	O
Stencyl	B-Application
to	O
reduce	O
the	O
need	O
to	O
recreate	O
common	O
game	O
behaviors	O
,	O
and	O
several	O
game	O
"	O
kits	O
"	O
provide	O
functional	O
starting	O
points	O
for	O
common	O
2D	O
game	O
genres	O
.	O
</s>
<s>
Using	O
Code	O
Mode	O
for	O
a	O
behavior	O
permits	O
the	O
user	O
to	O
program	B-General_Concept
logic	O
in	O
traditional	O
textual	O
form	O
and	O
optionally	O
open	O
the	O
code	O
in	O
an	O
external	O
editor	O
.	O
</s>
<s>
Alternatively	O
,	O
Design	O
Mode	O
is	O
a	O
GUI	B-Application
that	O
allows	O
users	O
to	O
create	O
modular	O
game	O
logic	O
for	O
actors	O
and	O
scenes	O
using	O
a	O
visual	B-Language
programming	I-Language
language	I-Language
.	O
</s>
<s>
The	O
concept	O
of	O
Design	O
Mode	O
as	O
a	O
form	O
of	O
end-user	O
development	O
originated	O
with	O
MIT	O
's	O
Scratch	B-Language
computer	O
language	O
learning	O
environment	O
and	O
was	O
used	O
with	O
permission	O
for	O
Stencyl	B-Application
.	O
</s>
<s>
As	O
it	O
is	O
a	O
visual	B-Language
programming	I-Language
language	I-Language
,	O
Design	O
Mode	O
users	O
are	O
not	O
required	O
to	O
learn	O
or	O
type	O
out	O
a	O
particular	O
programming	O
language	O
,	O
nor	O
must	O
they	O
concern	O
themselves	O
with	O
syntax	O
.	O
</s>
<s>
StencylForge	O
is	O
an	O
integrated	O
online	O
storage	O
and	O
sharing	O
service	O
for	O
Stencyl	B-Application
games	O
and	O
game	O
assets	O
.	O
</s>
<s>
It	O
can	O
be	O
used	O
to	O
back	O
up	O
projects	O
and	O
access	O
projects	O
from	O
other	O
computers	O
when	O
logged	O
into	O
Stencyl	B-Application
.	O
</s>
<s>
Integrated	O
with	O
Stencyl	B-Application
is	O
the	O
image	B-Application
editor	I-Application
.	O
</s>
<s>
Its	O
use	O
in	O
Stencyl	B-Application
is	O
usually	O
secondary	O
,	O
as	O
images	O
are	O
typically	O
imported	O
directly	O
from	O
the	O
computer	O
after	O
being	O
created	O
separately	O
.	O
</s>
<s>
Stencyl	B-Application
can	O
alternatively	O
be	O
set	O
up	O
to	O
use	O
external	O
image	B-Application
editors	I-Application
,	O
such	O
as	O
Photoshop	B-Operating_System
and	O
GIMP	B-Application
,	O
to	O
modify	O
images	O
already	O
loaded	O
into	O
a	O
project	O
.	O
</s>
<s>
Stencyl	B-Application
also	O
supports	O
user-created	O
extensions	O
to	O
add	O
functions	O
to	O
the	O
software	O
.	O
</s>
<s>
For	O
example	O
,	O
an	O
extension	O
could	O
add	O
new	O
blocks	O
for	O
Design	O
Mode	O
use	O
,	O
such	O
as	O
a	O
third-party	O
API	B-Application
.	O
</s>
