Upon clicking START you will be presented with a 5×5 table of UK 25K+ cities. The object of the quiz is to double-click on the cities in order from easternmost to westernmost.

Double-click on a city’s text and it will be selected and you will get a score. 100 points corresponds to the easternmost city, 0 points to the farthest west – score decreases based on how eastern your selected city is in relation to all of the remaining cities.