Whenever you switch from the dolphin to the seagull or vice versa, you will get an additional 10 points of health. So keep switching back and forth to get as much health as needed.
Imagic Address
Release the mermaid seven times. The address for Imagic will appear at the bottom of the screen.
Programmers' Initials
Release the mermaid on level two, but swim up and leave before her cage fully opens. Transform into a seagull and fly to the left or right to a volcano. The initials of each programmer will form the volcanoes.