[Cthulhu_]

Integrating this app into Playgrounds in xcode would work, although they'd have to make it accessible; xcode is easy enough to install, but it's not marketed as a "install this to learn to code" type of app. Distributing it separately would be better.

[Grustaf]

The playground format that this course uses ("playground book") is currently not supported in xcode, but hopefully that will change at some point.