It doesn't use original blender files, but has an own blender exporter.
You shall build different parts of your level with different objects in blender, when exporting several objects as one mesh, the engine handles them at submeshes and only renders the required submeshes while hiding the others. I didn't test that, yet.
It has not much features, the given functions are still quite a few.
Still publishing pipelines to others than windows are missing (at least none with a free license).
There is a load level function, but no save instructions.
GUI:
it's possible to do simple GUI with script with brutal force > linking GUI to camera
Or it's using the c++ SDK[...]
