live! And since it is the first day, and it has already reached £17,532 out of £20,000, it is certainly going to be funded.
The system's engine is called 2D20, and it is the very same engine as the one for the new Conan RPG, which I have tried and enjoyed at the Eternal Con in 2016.
There are many different pledge levels, and lots of add-ons. Actually maybe too many pledge levels— I have trouble figuring out which pledge level you must choose depending on what you want to get. For instance, there doesn't seem to be a way to only get the PDFs (which is what I would have liked to pledge).
You may want to download the sample chapter to get an idea of how Modiphius have rendered Barsoom as a role-playing setting.