You're the cat.
The dog chasing you.
Eat all the fish you can.
Tilt the device to move the cat.
The first time you have to calibrate the accelerometer.
For this, move up the pink arrow tilting your device.
If you have not calibrated correctly, click on cat's life number 7 and again the pink arrow appears.
Credits for Music:
"Run Amok" Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0