Unfortunately this is due to your device. The Android version is large and takes significant resources. We however will be moving to smaller sized releases starting at the end of February. Although we will continue to update the large game, users like you will continue to have problems due to your device. Sorry
Again it's due to device limitations at this point. The crashes are due to you're devices Ram, and how Ren'py loads the game. We are going to be releasing new content in smaller apps that will entirely resolve this issue. But the large SU game will only get more crashes on your device as it gets more content added.