How to play The Four Currencies.
There are 4 stages, one for every currency. In stage 1, a 20 dollars bill need to be revealed. Right of the blank bill, there are 3 symbols, which represent the dollar. And under the bill there are all random symbols, which will switch from time to time. Click only the symbols, which represent the dollar to reveal the whole bill.
In the rest 3 stages, the same is done for the yen, the pound and the euro.
Know 4 currencies.
Winning the game rewards +1 Knowledge Level
The download version(bottom of the page) include an executable file for Windows OS with local levels only.
Here is a gameplay movie on YouTube.