Clicking on the keypad displays different images; anyone worked out the others?

Here's an excerpt from the Guardian:

The doodle features many of the touchstones of Adams's popular writing.

It displays a cup of tea - a reference to one of his Dirk Gently detective novels, called The Long Dark Teatime of the Soul. It also shows a towel, an item Adams wrote was essential when travelling in space).

With a click of a lift door on the doodle, one of Adams's most enduring characters from the Hitchhiker novels, Marvin the paranoid android, is revealed.

There are many references to the Hitchhiker's Guide. With many clicks, some of Adams's best fictional inventions, including the Babel Fish, which can be inserted in your ear to translate any language, are on show.

http://www.guardian.co.uk/books/2013/mar/11/douglas-adams-ce...