Click Use this template on the top right to create a repo using this repo as a template. This will prompt you to enter your new repo's name.
Via cargo-generate:
Run from a terminal:
$ cargo generate --git https://github.com/fltk-rs/fl2rust-template
This will prompt you to enter a project name.
Please check the fltk-rs repo for the necessary dependencies required for creating fltk-rs applications.
You can then open the fl file with fluid using:
$ fluid gui/mainview.fl &