Dr Who
Every online games site has this simple game in one form or other, but it still manages to be quite fun, so I decided to give it a go. My version isn't as good as many others out there, notably due to lack of animation or sound. Oh well, never mind, eh?
Incidentally, if anyone reaches level ten, I think it will crash - or at least behave unpredictably - screenshots welcome, if anyone manages it!
Have a look at the version at Clevermedia to see a well made one.
The applet uses the keyboard so needs 'focus'. Click on an empty part of the applet if it is not responding to the keyboard.