Octo is a very naughty octopus. He often picks on the other marine animals. Your job is to rescue Octo's victims and teach him a lesson. To do this, you are provided with some balls. Using the mouse you can guide these balls through the water to hit Octo, but be careful not to lose too many of them along the way.

Later levels introduce jellyfish which destroy balls on contact, pits which balls can't be retrieved from, and black and white balls which destroy each other on contact. Complete all 15 stages to put an end to Octo's bad deeds!