This is genuinely impressive work. Obviously it's very rough around the edges, but everything you'd find in JPB is here. Redo the assets, add the remaining creatures, add some minor touches, and you'd have a perfect experience.
I'm glad to see someone doing this. I wanted to do something like this myself, but I could not wrap my mind around coding whatsoever.
By the way, I got stuck on 'Takeout Meals' mission. For some reason, the 'Feed 2 Dinosaurs' goal will not complete.