Back in the Flash days, it was easier to site-lock games to avoid them getting stolen. It's been harder with HTML5 games and there are lots of sites out there that just leach everything. You could try sending the site a takedown request if you can find the option on their site.
Remi-le-Oduen
I think they should have at least asked you if it's okay. Doing this without your approval is absolutely wrong. Maybe contacting them about this is a good start
MrDoth
Unfortunately none of those pages has a way to send a report or anything :s however I've been thinking about it and I think that in the end it's better, because more people know the game, that if, in the next update I'll add a disclaimer where players are redirected to newgrounds hahaha