Hello DMR1,
I'm sorry you are experiencing these issues. I believe it has to do with the memory of your phone. I'd say, first of all, make sure you don't have too many apps running in background so the game have enough RAM to display its assets.
We'll try to make an option so you can reduce the quality of the images and then lower the RAM impact so it runs better.
But for the moment I don't have any other ideas on how to make it run better.