Poorly written by @jmperezperez during the MHD Paris 2014, and slightly tweaked afterwards
Checkout the code on GitHub. Pictures, music and data provided by Spotify.

Spotify iQuiz

What's this?

Do you really know about the music you have in your playlists?

iQuiz creates a Quiz about your library tracks. Turn on your speakers.

(note: it only supports Chrome & Firefox on Desktop so far).