You will play as a small fish at first in a deep sea water. There are many fishes swimming by, some big, some small, some huge, some tiny. Your task is to eat any fish that is smaller than you which makes you grow. As you grow, you can therefore eat larger fish. Fish eats other fish merely by touching each other, touching any fish larger than you ends the game.
Control your move with the ARROW KEY, the game has a sense of inertia and resistance, it takes a second or two to accelerate to full speed, and you will slow down and stop without pressing any keys. Hitting the left or right edge of the deep sea will cause you appearing on the opposite edge. Have fun and enjoy!