<s>
Twofold	B-Operating_System
Inc	I-Operating_System
.	I-Operating_System
is	O
a	O
2016	O
puzzle	O
video	O
game	O
for	O
iOS	B-Application
and	O
Android	B-Application
in	O
which	O
the	O
player	O
slides	O
the	O
game	O
board	O
to	O
form	O
color	O
chains	O
that	O
can	O
be	O
removed	O
with	O
a	O
single	O
swipe	O
.	O
</s>
<s>
It	O
was	O
created	O
by	O
the	O
Swedish	O
indie	O
developer	O
Grapefrukt	B-Application
,	O
who	O
previously	O
released	O
Rymdkapsel	B-Application
.	O
</s>
<s>
Multiple	O
reviewers	O
compared	O
its	O
endless	O
puzzle	O
gameplay	O
to	O
that	O
of	O
Threes	B-Application
.	O
</s>
<s>
The	O
game	O
received	O
"	O
generally	O
favorable	O
"	O
reviews	O
,	O
according	O
to	O
review	B-Application
aggregator	I-Application
Metacritic	O
.	O
</s>
