Hi there! I see you're having an issue with the Jewels of the Wild West app closing unexpectedly on your Kindle device running Android 11. Let's get this sorted out for you.

First, could you tell me a bit more?
- Does the app close immediately when you open it, or does it crash during gameplay?
- Have you tried any troubleshooting steps already, like restarting the device or updating the app?

In the meantime, here’s a simple step-by-step guide to help fix apps that keep closing on Android devices like your Kindle:

1. Restart your Kindle: Sometimes a fresh start clears temporary glitches. Power off your device completely, wait a few seconds, and turn it back on.

2. Clear the app cache: Cached data can sometimes cause issues. To clear it:
- Go to Settings > Apps & notifications > See all apps > find Jewels of the Wild West.
- Tap Storage & cache > then tap Clear cache.

3. Update the app: Make sure you have the latest version of Jewels of the Wild West installed. Visit the app store for your Kindle, check for updates, and install any available.

4. Clear app data (if needed): This resets the app to default, but it may erase saved progress, so use this only if necessary:
- In the same Storage & cache menu, tap Clear storage or Clear data.

5. Reinstall the app: If the issue persists, uninstall Jewels of the Wild West and then reinstall it from the app store.

If after these steps the app still closes unexpectedly, it might be related to device compatibility or an issue on the app’s side. In that case, please let me know, and we can explore further options, including checking for any known issues or contacting support.

Does that sound good? Would you like to start with these steps, or have you already tried some of them?