Looks like someone has managed to sneak another emulator into the App Store. This time it’s disguised as a File Manager app.
It boots *.smc files, and plays back classic SNES games. We do wonder how long it will last. At the time of this writing it’s still up. We don’t expect it to last very long.
As website TUAW, it even lets users play games off their Dropbox account. This means users don’t have to import the file to their iOS device.
Still, we don’t condone this kind of thing. If possible, get the Virtual Console version of a game.