You are an adult penguin in search of the lost penguin babies. You are known as the Defender and your job is to dive deep down into the dark waters under the ice and find all baby penguins and lead them up to safety. You have limited amount of air so make sure you find all the lost penguins fast. You navigate your penguin with a mouse and move the map with A,S,W,D keys. There are some formidable enemies down there so try to avoid them all together. Recommendation is to start playing the easy level where all baby penguins are invincible and you take only half of the damage you should. Once you catch on on how the game is played you can advance to other levels of difficulty.