I have modified the code to be compatible with Xcode 6 Beta 4 and finished implementing the simple physics system. I have not thoroughly tested it yet, but it appears to be stable enough. The next thing to implement is basic input handlers, although that will be handled game side rather than engine side.

I have also started listing todos and issues on GitHub’s issue tracker, and I created a simple wiki for documentation. The goal at this point is to have a complete working engine by August 15th so that I can begin development on a game with working title Anachronism.