In October we have released a completely new type of task in Codility Library that resembles the daily work of developers even better. We call them Project tasks.
Project Tasks have a natural, multi-file project structure, which replicates pretty closely things that developers do in the daily work (which means working with the complex codebase and applying changes by adding/refactoring a lot of files with every change).
Project tasks will allow you to gain new insights when testing Mid/Senior Developers. You can read more about these tasks here.
If you'd like to give us feedback, contact us at support@codility.com.