Sorry for the long (almost 5.5 hours!) downtime. :(
It was the same old kernel crashing issue that has plagued the game every now and then. I keep putting off the updates because it's such a rare crash and I'm usually around to fix it quickly when it does happen.
This time, it happened to be early in my first night of vacation and I overslept, so yeah. Thanks to the many, many people who contacted me about this. When I woke up and looked at my phone and saw I had 8721312 notifications, I knew something was wrong. :)
Sorry again for the trouble and I'll work at getting that kernel updated soon!