http://popcap.com/gamepopup.php?theG...arium&loadAX=1

It's a pretty addictive game. You have to feed fish to make them poop money so you can buy an egg, which will turn into a sea kinda thing that will help you onwards. There is a deluxe version that you can download but it only lets you play 6 levels or something. Then you have to pay for it.