Screenshot by Chris Matyszczyk/CNET

When you go to the Google home page in some parts of this world on Friday, you might think you have a medical problem.

The page, you see, won't stop moving. It seems as if there are vast numbers of strangely dressed men performing the Riverdance. (This is true at least in certain Anglo-centric iterations of Google.com, such as .au, .nz, and .uk. The doodle has yet to manifest itself on the US home page.)

Actually, this is the Whodle. Or at least this is what it's been known as during its four-month development.

In order to commemorate the Timelord's 50th anniversary, Google's doodlers have created an interactive spectacle featuring all 11 Doctors. They have stopped at nothing to ensure that this 8-bit multilevel platform game is a masterpiece of interactive theater.

In an attempt at sublime authenticity, Google put a Brit, Matthew Cruickshank, in charge. He explained to the Guardian: "They thought 'Oh, Matt is English, so he should do the doodle.' It was a bit of pressure!"

As you play, you'll realize just how intricately designed this whole thing is. There's the real whoosh from the Tardis. There are Daleks and Cybermen, of course. But, most of all, there are different levels reflecting different eras of the show.

Your mission, should you choose to accept it (and it's Friday, so why shouldn't you?), is to rescue the six letters of the Google name from the nefarious enemies.

I have a feeling that IT departments, developers, and, well most of the tech world, will stop and pay playful home for a whole day on Friday.