Moving between scenes is very easy within unity. You simpley need the command line Application.LoadLevel(). Here is a quick guide to using Application.LoadLevel().
Make sure you have placed all your scenes inside the Build settings menu. File > Build Settings.
Note the corresponding numbers on the right hand side of the window. For example the win scene here is number 3.
You can set the parameter as the number of the scene you wish to load..
You can set the parameter as the name of the scene you wish to load..
Example of use: