The code behind Haxeflixel is freely available and opensource. As well as that we also have snippets, demos and community utilities that make Haxeflixel that much better.
Download the core code for Haxeflixel.
Snippets are small pieces of code that demonstrate features of Haxeflixel and using the api.
See our working projects showcasing and experimenting with the Haxeflixel library.
Even more are available in Beeblerox's repository.