It is on divVerent/augenkrebs on git. The box physics are set by the "geomtype" property of the boxes, but that only works if your engine loaded the ODE library. We currently don't ship this library though, so it may be a bit tricky to get it to work. Maybe for the release after 0.6 though...
Given I asked for help in another thread, I thought I'd post a quick video here. This is just a test bed for ideas right now. You can see how the character starts in a medical wing with two floors. The ship has crash-landed so you're stuck on a planet. I'm going to extend the in-ship time - There may be an elevator of some sort since using vertical space will make the overall map size smaller. Remember I am seeing what is possible regarding a single player campaign and am juggling this with my studies. (like many of you I suspect)