This update is available on the beta branch for QuiVr. It can be accessed by going to your steam library, right clicking QuiVr, and selecting Properties -> Betas -> and selecting the 'beta -' branch. You can revert this by going to the same place and selecting 'NONE - Opt out of all beta programs'.
Additions
A new boss has been added to the game, it has a chance to be randomly selected (between it and the Cerberus) each boss spawn. Screenshots and descriptions will be added with the full release patch notes :)