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It uses the harddrive's motion sensor to figure out if the computer is being smacked on one side, and then switches to the next virtual screen in the opposite direction.

(that's what I gathered from the video at least)

This should be on the top of the readme, IMO.

Agreed. I just updated the readme.

There's a demo video: https://www.youtube.com/watch?v=4iyeqh9zHf8

Odd, first time I pressed this it was a video about some SSD.

Fixed that. I got it uploaded at midnight after switching between this and my Python homework.

YouTube has these weirdnesses lately!

Change to different desktop by tapping on the bottom right/left of your screen.

That's Shadowbook. Like Smackbook, but it uses the Macbook's ambient light sensor instead of the accelerometer. Haven't found that one yet.