If you're not in the habit of investigating Google Doodles, you still might want to try out this adorable little game made in honour of the Anniversary - you play as an adorable 16-bit version of the Doctor. It's fairly intuitive - collect all the letters, keep track of the Dalek movement patterns, and your health recharges after a while if you stand still. And it has the TARDIS dematerialisation noise, too.

The Guardian has squeezed a whole article out of this, by dint of getting an interivew with Google Doodle designer Matthew Cruickshank. "It was about four months ago that an employee here who's a massive Doctor Who fan added it to our list of potential doodles. We looked through it and realised that this was something special, a chance to really celebrate a national institution."

"I wrote the great things about Doctor Who, the things that fans would want to see. It came down to celebrating – obviously – all of the Doctors; I love the idea of regeneration. And then Daleks, and Tardises. Those are basically the three key points.

"The thing is that he's a Time Lord, a time traveller, so I really wanted to get the feeling across that you could travel to different eras. I definitely didn't want you to just play one level and that is it, I love the idea of the Doctor being able [sic] zoom around the universe."