A major goal for this project is to get more maintainers and contributors. Pull requests that improve usability, fix bugs, or help rbspy support more operating systems are very welcome. If you have questions about contributing, come chat on gitter.
The source code for rbspy is on GitHub.
If you're not a very experienced Rust programmer, you're very welcome to contribute. A major reason rbspy is written in Rust is that Rust is more approachable than C/C++. https://www.rust-lang.org/ has great resources for learning Rust.