<s>
Pulsar	B-Application
is	O
a	O
maze	B-Application
shooter	O
arcade	B-Application
video	I-Application
game	I-Application
created	O
by	O
Sega/Gremlin	O
and	O
released	O
in	O
1981	O
.	O
</s>
<s>
The	O
player	O
controls	O
a	O
tank	O
in	O
a	O
top-down	O
view	O
maze	B-Application
to	O
fetch	O
keys	O
used	O
to	O
unlock	O
the	O
next	O
level	O
.	O
</s>
<s>
Player	O
must	O
move	O
the	O
tank	O
through	O
the	O
maze	B-Application
to	O
reach	O
each	O
colored	O
key	O
and	O
transport	O
them	O
one	O
by	O
one	O
to	O
the	O
matching	O
colored	O
lock	O
.	O
</s>
<s>
The	O
structure	O
of	O
the	O
maze	B-Application
is	O
changing	O
every	O
second	O
and	O
there	O
are	O
several	O
kind	O
of	O
enemies	O
that	O
move	O
on	O
they	O
own	O
unique	O
way	O
shooting	O
to	O
the	O
play	O
when	O
they	O
are	O
in	O
a	O
direct	O
line	O
(	O
horizontal	O
or	O
vertical	O
)	O
.	O
</s>
