Question: Have you ever considered the question of whether you will receive any of the money generated by having your game on another website with neither your permission nor consent? Do you receive any of that ad revenue money?
Then ask this same question of any other devs who may be unaware their stuff was pilfered and re-uploaded elsewhere.
I grew up in the 'flash games' era. Good riddance. Most of that garbage is on mobile but the amount of exploits they could to actively stealth-install actual malware on user computers was insane. Don't even get me started on 'persistant flash cookies' and 'stealth cookies' and other tracking garbage. Good riddance to flash, to flash games, and to the devs who made them. Good riddance!