<s>
On	O
each	O
level	O
,	O
the	O
player	O
has	O
to	O
guide	O
a	O
group	O
of	O
bouncing	B-Application
balls	I-Application
from	O
the	O
right	O
edge	O
of	O
the	O
level	O
to	O
the	O
left	O
edge	O
.	O
</s>
<s>
The	O
balls	O
are	O
constantly	O
bouncing	O
,	O
and	O
the	O
player	O
can	O
only	O
alter	O
their	O
travel	O
speed	O
(	O
by	O
moving	O
the	O
joystick	B-Device
left	O
or	O
right	O
)	O
or	O
make	O
them	O
bounce	O
higher	O
(	O
by	O
pressing	O
the	O
fire	O
button	O
)	O
.	O
</s>
<s>
Hoppin	B-Application
 '	I-Application
Mad	I-Application
received	O
varying	O
reception	O
from	O
different	O
platforms	O
by	O
video	O
game	O
critics	O
.	O
</s>
