I strongly recommend you to read all this tutorial chapter by chapter.
All examples of this tutorial are in the samples I share with you here
They are all functionals, and you don't need a web server.
You can test them and open them to understand what to do. In every samples the to places to go are ** app.js ** and ** topology.js **
And after that, then go to this one
1/ create your first topology
https://github.com/NeXt-UI/next-tutorials/blob/master/tutorials/letsplay/letsplay-01.md
You can skip the installation part and go directly to the files
2/ Add Additional icons
https://github.com/NeXt-UI/next-tutorials/blob/master/tutorials/letsplay/letsplay-02.md
3/ Add an action panel to your application
https://github.com/NeXt-UI/next-tutorials/blob/master/tutorials/letsplay/letsplay-03.md
4/ Let's comeback to Path Drawing
https://github.com/NeXt-UI/next-tutorials/blob/master/tutorials/letsplay/letsplay-04.md
5/ What can you do with Class Extension
https://github.com/NeXt-UI/next-tutorials/blob/master/tutorials/letsplay/letsplay-05.md
6/ Scene Manipulation
https://github.com/NeXt-UI/next-tutorials/blob/master/tutorials/letsplay/letsplay-06.md
7/ Tooltip Policy Customization
https://github.com/NeXt-UI/next-tutorials/blob/master/tutorials/letsplay/letsplay-07.md
And then go there.