Yeah, I definitely vibe coded parts of it, especially some of the graphs, but a lot of time went into the actual mechanics and how the systems interact. I also got a lot of pushback from my girlfriend (PhD in virology, teaches evolution), so she kept asking hard questions and forcing me to rethink things. And my kids do a check their worlds every morning, collect organisms and use the narrate feature to see what happened overnight, and their honest feedback helped a lot :D