The first download i did the asset folder apparently just, vanished, so i did a fresh install, this one got to the game, where i fought a bandit (i won! Killed him with a flint knife) then i saved and quit the game.
A few hours later i tried loading the save, and it closed the application. The same happened when i tried making a new save.
I did notice that moving in the overmap screen seemed to have a very significant delay, as if my device was struggling to keep up, it may be that. Will check later.