Yeah, it does seem like restarting the game with the Yes button creates some issues. Thanks for pointing this out, I'll add that as a known bug
The no button fades the screen out and quits the game. I'm not sure why it doesn't close the window itself
I really like this style. I had a similar approach of randomly generating creatures so it's cool to see someone with artistic skill do this. And a hidden object type game works well with this.