Game crashes after entering worlds

Eveytime that I attempt to enter one of my existing worlds, the game crashes out back to the home screen but leaves a version running in the background. I had to delete all my worlds because they all did this. I started a new survival world and it seemed to work fine for a few hours but then it also crashed out and I lost all the many hours of work put into those worlds.

Also noted is the phone is almost overheating after a few minutes of play.