<s>
Gyroscope	B-Application
is	O
an	O
action	B-Application
video	I-Application
game	I-Application
published	O
by	O
Melbourne	O
House	O
in	O
1985	B-Application
for	O
the	O
Acorn	B-Device
Electron	I-Device
,	O
Amstrad	B-Device
CPC	I-Device
,	O
BBC	B-Device
Micro	I-Device
,	O
Commodore	O
64	O
,	O
and	O
ZX	B-Operating_System
Spectrum	I-Operating_System
.	O
</s>
<s>
It	O
is	O
based	O
on	O
the	O
Atari	O
Games	O
arcade	O
title	O
Marble	B-Device
Madness	I-Device
.	O
</s>
<s>
Melbourne	O
House	O
would	O
go	O
on	O
to	O
publish	O
the	O
official	O
ports	O
of	O
Marble	B-Device
Madness	I-Device
for	O
the	O
ZX	B-Operating_System
Spectrum	I-Operating_System
and	O
Amstrad	B-Device
CPC	I-Device
,	O
but	O
these	O
were	O
not	O
based	O
on	O
Gyrosope	O
.	O
</s>
<s>
The	O
gameplay	O
is	O
very	O
similar	O
to	O
Marble	B-Device
Madness	I-Device
except	O
the	O
player	O
controls	O
a	O
spinning	O
gyroscope	B-Application
rather	O
than	O
a	O
marble	B-Application
.	O
</s>
<s>
The	O
player	O
must	O
guide	O
the	O
gyroscope	B-Application
from	O
the	O
top	O
of	O
the	O
course	O
to	O
the	O
bottom	O
within	O
an	O
allotted	O
time	O
limit	O
.	O
</s>
<s>
If	O
the	O
gyroscope	B-Application
topples	O
off	O
the	O
edge	O
,	O
a	O
life	O
is	O
lost	O
.	O
</s>
<s>
Hazards	O
on	O
the	O
course	O
include	O
potholes	O
,	O
aliens	O
and	O
glass	O
slopes	O
which	O
cause	O
the	O
gyroscope	B-Application
to	O
spin	O
in	O
random	O
directions	O
.	O
</s>
<s>
The	O
gyroscope	B-Application
had	O
to	O
land	O
on	O
a	O
marked	O
square	O
to	O
complete	O
each	O
level	O
.	O
</s>
