How to reskin game:
If you want to edit source code of the game, you will need to have a license of the program. But to reskin the game, you have to replace images folder(included in buyers pack). You have your own reskin game. Game has 20 levels, but you can easily add more levels. There are lot of objects with physics behaviours, so change their parametars and build much more interesting obstacles and gameplay. In documentation, provided, you can see how to export project for android, but you can also export for ios windows, also for desktop(html5 game). Also, you can use ludei service(cocoon.io) for export project. No programming knowledge needed for reskin game.