Wait, what? Why are there anti-privacy trackers whitelisted?
Basically when they decided to host it, they forced the tracker "keen" to be used. Its fixed now, but forcing trackers on users seems very negative.
I think it's just used to increment a play count.
It is free and open project, and made as experiment for users to play. It is reasonable enough to collect simple data about interaction with game, in order to identify how to improve it and get experience that we keen to share with anyone.
I am using Chrome 42.0.2311.50 beta (64-bit) on Linux 3.19.2 and it works just fine for me.
I had the same problem. I disabled my adblocker (ublock) and then it worked. Using latest stable Chrome under up-to-date Ubuntu.