Each individual cloud is worth 30 points each. Once you
have taken out all the clouds you progress to the next level. With each new
level the size of your paddles decrease.
If you're not playing for a high score I'd recommend only completing stage one
and around a quarter of stage two. The game has a maximum earning of 1,000ZP per
game, so once you've reached a score of 1,000 points you can just waste the rest
of your lives and collect your points. 1 Point = 1 Zetapoint.