Actually, Vortex2 is already available on Github, on the vortex2 branch of the Vortex repository:
https://github.com/JaviCervera/vortex/tree/vortex2
The thing is that Vortex was originally conceived as a very low-level library, where you have to deal directly with things like matrices, transforms and render list management. The current version of the repository, the documentation and the samples use that low-level library, but I want to change that before releasing it officially.
I have written a layer on top of that which provides a more Blitz-like interface, with classes like Entity, Camera, Model, Light, Sprite and World. It is basically done, so I just have to clean it up a bit and upload this to the repository.
Then, I will update the included samples to make something more visually appealing (something in the lines of what I posted in this thread) and write documentation for everything, and it will be time to release it officially.
The good news is that I am on holidays this month, so I have more time to get some work done on Vortex2. I'll spend a reasonable amount of time on it next week (I'll be out of home for the weekend), and a semifinal version (without documentation) might be uploaded sometime next week.