Hi there! I understand you're having trouble with the House of Fun app not working on your Windows 10 device using a WebKit-based browser. Let's see what we can do to get you back to playing.

To start, could you tell me a bit more about the issue? For example:
- Does the app fail to open at all, or does it open but freeze or crash?
- Are you using the app through a browser or the standalone app?
- Have you noticed any error messages?

Meanwhile, let me guide you through some general troubleshooting steps that often resolve such issues:

1. Clear Browser Cache and Cookies: Cached data can sometimes cause loading problems. Go to your browser settings and clear cache and cookies to refresh the app's data.

2. Disable Browser Extensions: Sometimes browser add-ons or extensions can block app scripts. Try disabling extensions one by one to see if one is causing the problem.

3. Update Your Browser: Make sure your WebKit browser is updated to the latest version. Outdated browsers can have compatibility issues.

4. Reload or Restart the App: Simply close the browser tab or the app and reopen it to refresh.

5. Check Internet Connection: Ensure your network is stable, as connectivity issues can prevent the app from loading fully.

If you've already tried these, please let me know which ones—you might have tried some steps—and any more details about the issue so I can guide you further.

Does that sound good to start with? If needed, I can also provide more advanced steps next.