is not a specific gaming website but rather the domain for Amazon CloudFront , a legitimate Content Delivery Network (CDN) used by developers to host and deliver game assets at high speeds.
Look for repositories with recent commits (less than 3 months old). Old links break as developers delete S3 buckets. cloudfront net games list
Even if you have fast internet, you might download from a "cold" or distant CloudFront edge location. CloudFront