It isn't quite dead yet. It is just entirely Flash based so it likely won't make it to 2021. Safari has already blocked Flash completely while the other major browsers require you to manually enable it. Odds are those too will begin blocking Flash completely sometime in the next few months with Adobe set to end official support at the end of the year. So maybe add zombo.com to your Chrome whitelist and visit it one more time, because soon the infinite won't be possible.