Play Online Now (Unity)
mac standalone (10.4+ universal)
windows standalone
unity source
Thanks to Terry, Ian Snyder, Brog, Rinkuhero for comments/suggestions.
If you are experiencing some control lag/strangeness, then I recommend you try running the standalone version from your system in fullscreen mode.
Edit: changed one of the puzzles – Perrin and Draknek alerted me to the fact that there was some very misleading stuff going on with one of the rooms. The change makes one of the puzzles worse, but overall will work out okay I hope : /
Edit: There were some collision bugs reported as well with people getting stuck in walls – that should also be fixed now.
Edit: some more physics bugs fixed with pushing stuff around.