Instructions HERE:

TOUCH THE "HELP" ICON ON MAIN SCREEN!
If you cant figure that out, this game may be too hard for you! But simply-

Rotate the rings around the squid to make a path with the symbols from the squid to the outside.
The symbols show where the path will go. If you see a fork, the path will split where the fork goes.
When you tap the squid, it will start reaching like fluid along the path trying to find a way from center to outside the outermost ring.
The more of the squid that can get outside, the better. If you can get more than one path complete, you get better score.
Try the zen mode to experiment.
It is interesting, but the music in some places are disturbing and sounds like "die, die, die, die". Just me.

~Anguawolf~ about Hungry Squid