Hi! I see you're experiencing a black screen when trying to open the Word Wars app on your iPhone with iOS 17.3.1. Can you tell me a bit more about the situation? For example:
- Does the app show any splash screen or logo before going black?
- Has this issue just started recently or after an update?
- Have you tried any troubleshooting steps so far, like restarting your phone or reinstalling the app?

This info will help me guide you better. Meanwhile, here are some common steps we can try to fix a black screen issue:

1. Force close the app:
- On your iPhone, swipe up from the bottom and pause in the middle (for Face ID phones).
- Find the Word Wars app preview and swipe it up to close it.
- Then try opening it again.

2. Restart your iPhone:
- Hold the side button and one of the volume buttons until the slider appears.
- Slide to power off, then turn your phone back on.

3. Check for updates:
- Open the App Store, tap your profile icon, and scroll to see if Word Wars has an update. Install if available.

4. Reinstall the app:
- Press and hold the Word Wars app icon, tap Remove App > Delete App.
- Then reinstall it from the App Store.

5. Check storage and permissions:
- Go to Settings > General > iPhone Storage and make sure you have enough free space.
- Also, in Settings, find Word Wars and ensure it has permissions it might need (like access to Game Center or network).

If after these the screen still goes black, it might be related to a compatibility or app-specific bug. In that case, I can help you contact Word Wars support or look for any updates from their team.

Let me know what you’ve tried and any other details, and we’ll get this sorted! Are you able to try these steps now?