I've just had a look at the roadmap to see where we currently are and it seems like the 0.5.0 is almost the planned 0.6.0
We are just missing the doors and maybe some editor functionnality (seat configuration/new map/entities customization)
Eh eh. That said, we haven't actually discussed what we want for 0.6.0 yet but I guess we'll be able to start the discussion soon.