You can play with the level editor by opening up the /FPP folder in the Git repository and then do the following:
- Under the /Scenes/Gyms folder, you should find a scene named Segment. In this scene, you will be able to edit and create new segment prefabs.
- Under the Assets-> Create-> Track menu, you have an option to create new track assets.
- And finally, you can modify and attach new tracks to the TrackController class by opening the Track scene under the Scenes/Main folder.
Feel free to improve the code and, more importantly, have fun!