I'm trying to approach this project by creating two custom views: one for the settings and the other for the game. That being said, I've got to juggle between ContentView, Game, and Settings, and I don't know how to pass the data back and forth between these (to do things like keep a score, etc.). I've got a State variable in my ContentView that keeps track of a score, and I'd like for Game to be able to add to that, and I want Settings to be able to set it back to zero. How would I go about doing this?

Without giving too much away, have a look at this article from Paul. I would say using EnvironmentObject would best suit your circumstances and this article will explain to you what to do.

https://www.hackingwithswift.com/quick-start/swiftui/how-to-use-environmentobject-to-share-data-between-views

Dave

edutainment is challenge right before introduction of switching between views. so i think it should be done using everything you learned before day 36.

This answer might be coming in a bit late, $ essentiall means it's a Binding that wraps around a certain value.

Binding(
   get: { return x }
   set: { x = $0 }
)

by definition, we can then pass these values as Binding<Type> and store them. This will then create a 2 way binding on every view holding this value.