Did you honestly think that Square-Enix would willingly let people play their games for free? We all know that companies are in existence for one thing: money. Not only that, but the original creator of FFI wasn't Nintendo at all. It was Square.

Also, I did click that grey screen a bunch for a long period of time and nothing happened so I figured it didn't work.

P.S. Fifteen (according to your profile) isn't much older than twelve.