Who doesn’t know the famous snake game, present in practically all current cell phones? Because there is a version of it on the App Store, which is temporarily free: it’s called Snake XT.
You move the snake by touching the screen and you can choose between the “Arcadian”(28 levels) or“Challenge”(Stay alive until you can).
The game is very simple, but for fans of the genre it may be a good choice. It can be installed via App Store (link), with an account that is not Brazilian (American, for example).