If you are experiencing crashes, reinstalling the game sometimes helps. However, reinstalling the game should be the last resort to try, and should only be attempted if your game is constantly crashing.

Before you start, make sure that you have connected your game to Supercell ID. You can do so by going to the in-game settings. Check if the button under "Supercell ID" is green, and reads "Connected."

To find out more about Supercell ID, please read this post.

Try the following steps:

1. Exit the game; go to your device’s Settings and tap on Apps;
2. Tap on the games App Icon and choose "uninstall";
3. Restart your device;
4. Go to the Play Store, reinstall the game and launch it;
5. Go back to in-game settings and log in to your Supercell ID to load your progress.

Try the following steps:

1. Exit the game;
2. Locate the Game Icon, tap & hold it until it begins to wiggle;
3. Tap the X in the corner of the icon, and agree to delete the app;
4. Open the App Store, and download the game;
5. Launch the game and log in to your Supercell ID to load your progress.