A built a native version and that had some issues. When I entered the dungeon area the message I rescued the captain popped up immediately and the same seemingly froze. But perhaps it was just the message in the way and I might have blindingly gotten to the exit back to the main map... So when entering the dungeon it needs to prepare the states of the canvas objects into a defined setup.
And other messages popping up (like finding the seeds or some other item) were either not filling the screen (if they were intended to do that) completely or simply too large, they occupied about 80% of the screen leaving a top row of the map visible. I'd say some scaling would be in order here.