I'm sorry you are having problems. I don't know why but some devices have a trouble running it. You could always try joiplay plug-in for Android. I've never used it but I heard you can play PC version of renpy games on Android with it. I'm not sure how good it works though. In the meantime, I'm going to try to see why some devices have trouble on Android and I'm also going to update renpy for the next version. Maybe that might help. Sorry you're having trouble.