http://i.imgur.com/RKpMQ7c.png really addictive, especially once you get far, you don't want to stop anymore ^^
But the achievements don't work so well... everytime I refresh or open it up again, I still have all the achievements I got, but I still start with 12points... it only saves the amount of points you have per session and I survived for so long, but I only unlocked the 150days achievment... not the 100days one as example... oh and due to the session thing... I believe it's impossible to get the multiple years total achievements, if you happen to close the game once...