What's 'Hamster Wheel Player'?
This is an application to switch to play (or pause) of the 'Music' app depending on iPhone's (or iPodTouch's) sway.
How to use 'Hamster Wheel Player'
1. Play the music from 'Music' app.
2. Start this application.
3. Try to walk in your pocket the iPhone. While it is shaking, to play you 'Music' app.
-- demo video --