Protecting Unity Web builds

// Check if the page is trusted
bool ValidDomain()
{
#if UNITY_WEBGL && !UNITY_EDITOR
    System.Uri uri;

    // parse the page's address
    if (!System.Uri.TryCreate(Application.absoluteURL, System.UriKind.Absolute, out uri))
        return false;

    // check the host
    return uri.Scheme == "file" ||
        uri.Host == "localhost" ||
        uri.Host == "yourdomain.com" ||
        uri.Host == "ludumdare.com";
#else
    return true;
#endif
}