So you checked this article? http://support.spacetimestudios.com/...rt-our-game%22

It comes from a Chrome update. I believe yesterday was an update.

Don't worry this is a problem with all games, although in fact it's Chrome who brings up the problems, not STS.

From another thread:

Quote Originally Posted by Samhayne
Unfortunately, this is not a universal problem. It appears to be a system specific issue. The problem that causes Chrome to get stuck also isn't specific to just our game. If you try playing other Chrome Apps that use Native Client you will likely encounter the same problem. We are working with Google to help to address the issue, but at this time we don't have any further official suggestions than the ones outlined in this support article: http://support.spacetimestudios.com/...rticles/963855

Check Greencrows guide (it works for all games) and the comments below (like on page 3):

http://www.spacetimestudios.com/show...-Chrome-again-)

from what i understood, you have to download an old chrome version (26 or 27 is it I think).

Next time if there's a notification ''Chrome is too old, please update'' ignore it.