To my surprise I find the latest release is V0.3a SVN 626 which appears to have been released on August 9th 2017!!!

I tried Emergency Call Ambulance on 0.2 and it was unplayable, several huge graphical errors. Tried it on SVN 626 and it is pretty much perfect! V0.2 has been on the main page of the site since probably 2011. I just don't get why they wouldn't put the latest releases on the main page. All these years I thought that was the latest version!
One other weird thing about Supermodel is that "since it's an alpha and not ready for release" bla bla it has no graphical interface. Everything is done through the command line. That really isn't a big deal to me but I'd imagine it makes it difficult on some users. Why not make up a simple interface? I just don't understand their thinking!
Anyways if you have any interest in playing some Model 3 games on your PC check out the SVN 626 release. It is pretty amazing how well they run.