Since the game loads fully on other browsers, it seems like the issue might be specific to Opera. Here are a few things you can try to troubleshoot the problem:
Clear Cache and Cookies: Sometimes, outdated cache and cookies can interfere with how websites load. Try clearing your Opera cache and cookies and see if that helps. You can find instructions on how to do this in Opera's settings.
Disable Extensions: Certain extensions can sometimes conflict with website functionality. Try temporarily disabling any extensions you have installed in Opera and see if the game loads properly.
Update Opera: Make sure you're using the latest version of Opera. Outdated versions might have bugs that have been fixed in newer releases. You can check for updates by going to Opera Settings > About Opera.
Try Incognito Mode: If the game loads in Incognito mode but not in regular browsing mode, it might be related to your browsing profile settings. Try launching Opera in Incognito mode and see if the game loads fully.
Check for Conflicting Software: In rare cases, other software installed on your computer might interfere with Opera. Try temporarily closing any background programs that might be resource-intensive and see if it resolves the issue.