JRが管轄する地下駅

Name all 50 states in the USA. Easy, right?

We made a list of the 20 countries that have the largest economies. How many can you name?

In 90 seconds, make every country disappear from the map by typing both its first 2 letters and its last 2 letters.

Drag the flag onto the correct state. Careful, though! One wrong move and the game ends.