the Forex doesn't have a central organism where currencies are dealt. You have to think of it as the global exchange of currencies. If you go to a bank and buy US dollars with your local currency then you have participated in the forex, in other words you have participated in that global exchange. But the idea is much broader. Forex includes the exchange of goods and services, investment transactions, speculation and everything else involved with money, even when you purchase something in a mall for your own use. All this is hardly transparent which makes it difficult for the layman and not so layman. Thats the nature of the Forex but it doesn't mean you can't make consistent profits from this enormous market.
A complex system such as the worldwide exchange of currencies can be narrowed down to relatively simple concepts for you to use. However, exactly because of this reason and it's low transparency, many scam artists arose to sell supposedly "profitable" trading strategies.
btw, there's no game. Forex is just forex, it can't be manipulated like a stock for example. The currency market is too large to be manipulated with the idea of scamming people.