There's a chance you might have missed the news that the GUI library Media Molecule used while developing Tearaway is now freely available to game developers on GitHub as ImGui.
The C++ GUI library became freely available late last year and is worth noting today because it may be of use to game developers wrestling with interface design and development in their own projects.
ImGui is currently being maintained and updated by indie developer Omar Cornut, who developed a version of the library while working at Media Molecule and continues to work on it with financial backing from supporters via Patreon.