Game programming is so fragile that most new games get written from scratch, again and again. We've created a new game engine for pulling apart games into atoms and stitching them back together in novel ways. Our techniques are inspired by functional programming, reactive programming, and dataflow, but still use imperative blocks that many programmers are familiar with. The game engine is completely open source, as are the games written on it. We could do it as a talk, or as a tutorial where we show people how to use it. The project is hosted at https://github.com/CyberCRI/gamEvolve/. We work at the CRI in Paris (http://www.cri-paris.org/).