<s>
In	O
each	O
stage	O
,	O
players	O
aim	O
the	O
cannon	O
(	O
helmed	O
by	O
Bubble	B-Application
Bobble	I-Application
's	O
Bub	O
and	O
Bob	O
)	O
at	O
the	O
bottom	O
of	O
the	O
screen	O
,	O
using	O
it	O
to	O
shoot	O
differently	O
colored	O
bubbles	O
at	O
a	O
hanging	O
arrangement	O
of	O
bubbles	O
at	O
the	O
top	O
of	O
the	O
screen	O
in	O
order	O
to	O
make	O
them	O
disappear	O
within	O
a	O
time	O
limit	O
.	O
</s>
<s>
Additional	O
stages	O
from	O
previous	O
games	O
are	O
also	O
available	O
as	O
paid	O
downloadable	B-Protocol
content	I-Protocol
.	O
</s>
<s>
The	O
game	O
received	O
above-average	O
reviews	O
according	O
to	O
the	O
review	B-Application
aggregation	I-Application
website	O
Metacritic	O
.	O
</s>
