Hi. There is a bug for android were it just keeps crashing or it just be my android but if it is a bug then i'm just going to leave this here and hoe you see it. Also I love your games
It's possible you need to open more memory for it to run correctly or that a virus scanner has falsely labeled it as dangerous and is closing it out. Checking for potential updates needed on the device sometimes helps. Or you could try making it easier to run by turning off the animations. Unfortunately, randomly shutting down is a device specific problem and I can only guess what might be happening. Glad you like the games, though!