Puzzle Bobble.
Success at this game hinges at about level 7, I am not sure exactly which one it is, I think it's 7.
Anyway, the bubbles have no gaps between them and there are about 6 rows of them.
This level is deceptively difficult.
To clear it, you MUST concentrate on the edges and get as deep into the structure as you can.
Do not be rushed, you have about 10 seconds to aim and shoot each bubble

Assuming you pass this level, further on in the game you'll come to another level where the bubbles are arranged with a shape like this;

Where the

are blue in colour!
It is possible to score over 3,000,000 on this level.
If you have all lives intact, open up the front row to get access to the blue bubbles.
Then build up as much bubbles as you dare without blocking the access to the blue one.
When you get a blue one, fire it in and clear the pattern of blues causing a huge chain reaction and scoring you over 1,000,000
Then commit suicide if you have more lives left and repeat until you are down to your last life

There are later levels you can do this on too for even more points, I'll let you find them for yourself
