He wrote in a follow-up message on Instagram that he had seen the shells during a walk on the beach, "which I assumed were a political message".
Composer Lorien Testard - who had never worked on a video game before - was discovered via posts on music-sharing website Soundcloud."I call this the Guillaume effect. He's very good at finding really cool people," says Jennifer.
Guillaume more modestly attributes his success rate to Covid - people looking for a creative outlet - and also "massive luck"."It's always the same story," he says."I have a list of 15 people to contact and I'm like: 'Okay I'm probably going to get maybe no one at all'.
"And every time the first one is like: 'Yeah, let's do it'."But Guillaume does admit that he targeted people who seemed to be "in line with the direction" he wanted to take the project.
"Lorien, when we discussed the game for the first time, we had exactly the same references," he says.
"We loved the same thing. We watched the same things. The discussion was so fluid.""I just loving being a mom."
Ms Walsh, who has been sober for four years, said she wanted to speak out to help other people and show them it was possible for them to turn their lives around."I'd like to get the word out to inspire people that it doesn't matter how far you think you've gone into addiction," she adds.
"You can always come out there's always away. Never give up."There is an end in sight."