Using Unity iOS
Congratulations! You now have a bowling game incorporating the basic features that typically comprise a 3D game: 3D graphics (of course), physics, sound effects, player control (of the bowling ball), camera movement, and a graphical user interface.
The default built target is listed on the title bar of the Editor window as PC, Mac and Linux Standalone. If you were to perform an OS X build of the bowling project right now, the game would run essentially the same as it does in the Editor. Same for Linux, Windows, and even a web player (although a web player build would require you to switch build targets first).
Targeting iOS is another story. You could change the build target for the bowling game to iOS right now ...