Using VS Code
In your VS Code, go to the Extensions tab and search for RangiChangi Chamkilo, then click on Install and reload once the theme is installed.
Downloading from Release section
Go to the release section on the github and download the latest stale release of this theme extension and then got to your vscode Extensions then click on Install and reload once the theme is installed.
By cloning this repo
Clone this repo to your machine, and copy its entire contents to the vscode/extensions folder.