Hi there,
We are currently trying to track the issues for logging in via Google/Facebook and if you are having trouble logging in via Google/Facebook as no browser window is opening when you click either of the buttons would it be possible for you to download this test app and let us know if it works or not for you: https://www.dropbox.com/s/ruxnc43ioqmglvk/browsert...
In the mean time you can log in if you use the itch.io app (www.itch.io/app) to run the game.
Thanks!