Hmm... I think there might be a memory leak in the Android version. It runs fine for a while, then I start to notice Android closing all of my background apps, then it crashes. The app log says it was using 2.1GB of ram just before it crashed. (Basically everything the tablet has)
I dug out my old tablet (Huawei) to see if it was just a Samsung problem, and it happens on that one as well.
It's still playable, and the crash happens slow enough that I have a chance to save, but it sure is annoying.