For those of you who want to do more with this project, there are still plenty of things you can do. Here are some ideas to get your mind thinking:
There are still a number of things you can do with Inno Setup. You may wish to do more things, such as change the image on the right-hand side of the installer welcome screen. For more information on this, check out the documentation for Inno Setup at http://jrsoftware.org/ishelp/.
Now that you know how to export to PC, Mac, and Linux, you can try exporting your game to Android as well! You'll need to have the Android SDK and a few other things to take into consideration, but it's not too bad at all. For more information on doing Android development, check out http://docs.unity3d.com/Manual/android-GettingStarted.html.