OK, thank you. Recently we've been having a few people struggling with the Android version of the game, and are still trying to work out what might be happening. I have a potential fixes, but they might not work:
You can try clearing space on your phone, in case there isn't enough storage; you can try turning in game animations off from the settings menu; you can see if there's a security feature or virus scanner blocking the game from running.
Again, other people have had issues as well that were not fixed by the above solutions, so I apologize if none of those work. We are still looking into the matter to see if there's a more reliable solution!