The project grew from tap-for-vocabulary word to play Pong, act as Magic 8 ball, and react to air-punches. Once you have an accelerometer, might as well use all of it. You can see the interactions on the YouTube video.
On tap, the ring shows a vocabulary word. On tap or double tap, it next shows definition.
On double tap, it starts Pong game, the paddle position set by tilt of accelerometer.
On an upside-down shake, the ring says to consider a question, waits for another shake to give a response. On air-punch (or shake), Wordy puts up a punch word (BIFF, Pow!) and a couple rectangles for emphasis.