Thanks for being interested in contributing to Lil Pwny. I'm always looking for more contributions towards the project.
You can make recommendations for new functionality via raising issues using the feature request template. Even better, you could contribute the additional functionality yourself and create a pull request for the changes to be added to a future release.
Lil Pwny follows Google style guidelines mostly, but the main thing is to stay consistent to the style already in use.
Currently, documentation and additional resources are kept on my blog