You can tell a game uses Flash if: you have to use your mouse to control the game or your keyboard, if you are unable to highlight text and items in the game or by right clicking your mouse on the game will usually bring up Flash options for your Flash settings.
Using your mouse to control flash games is what makes these kinds of games the best to play. This means that you can get straight into a game rather than spending hours memorising keyboard navigations and shortcuts. Although most people are familiar with using joy pads to play games not keyboards do not let this put you off playing games that use keyboards as putting the time in to learn controls for such games are definitely worth it.
When playing online games some people will try and get you to pay for them, such as online bingo where you have to pay per game. However, there are always free alternatives in the Flash world and many free Flash games are just as good as their paid alternatives. It is up to you which version is the best for you but why pay for a game that has a free alternative?
There are sites online known as gaming portals such as the one you are on right now. You can find and play free Flash games through these sites by searching through the site for the kind of game that you are after. These games will run through your current default browser regardless of if you are a IE fan, Firefox fan, or Chrome.
As long as you have the latest Flash player installed then you do not need to download Flash games to play them, you simply play the game through your browser. If you do not have the latest Flash player installed then your browser will automatically ask you if you want it installed. Once that has been taken care off you are good to go.
Also, because you are not downloading anything when play Flash games you do not have to worry of any viruses infecting your computer. Playing free games through your browser is the easiest and simplest way to play games. As long as you do not need to give any details or information to any online sites then you can play games to your heart's content knowing your computer and details are safe.
It does not matter what kind of games you are into, you will be able to find a game that suits your playing style. Online gaming portals will usually categorise games for you and you can pick categories such as: action games, racing, shooting, beat-em-ups and more.