The easy way is to write it at a higher level, and let the abstraction handle the meat of it for you. The easiest way is just to use an engine, an existing arra

The easy way is to write it at a higher level, and let the abstraction handle the meat of it for you. The easiest way is just to use an engine, an existing array of tools and frameworks that manages the abstraction in such a manner that (for the most part) you just have to select the build target. In this specific case, I used the Unity engine. I write in C#, and with Mono/OpenGL, Unity can build executables to various platforms, on (mostly) the same code.