As of Chrome 42 the exploit this used has been fixed. You can still play this by disabling web security. But that is, well, not recommended.

☜ ☟ Bandcamp Revolution ☞ ☝

Play a game of DDR on Bandcamp with your favorite songs.
1. Get Chrome.
2. Drag one of the following links into your bookmarks bar:

Play Bandcamp Revolution!
Play Bandcamp Revolution! (Hard Mode)
Play Bandcamp Revolution! (Insane Mode)
Play Bandcamp Revolution! (Easy Mode)

3. Go to a Bandcamp album or song page.
4. Click on the "Play Bandcamp Revolution" link in your bookmarks bar.
5. Click play on the song.


Check out the code on Github (don't actually - it's terrible).