Hi there! I understand that you're having trouble with the Codeword game, where it seems to accept any letter you input. Let's work together to resolve this!

First, can you confirm if this issue happens on all browsers or just specifically with the WebKit browser you’re using on Windows 10? Also, have you tried refreshing the page or clearing the browser's cache? Sometimes, cached data can interfere with game functionality.

Here’s a simple step-by-step guide to clear the cache:

1. Open your WebKit browser.
2. Go to the settings menu (usually represented by three dots or lines in the top corner).
3. Look for “Privacy” or “History” options.
4. Select “Clear Browsing Data” or something similar.
5. Make sure to select “Cached Images and Files” and potentially "Cookies" if you wish.
6. Click “Clear Data” or “Clear” to finish the process.

Let me know if this helps! If the game is still not working properly, we can try some deeper troubleshooting steps.