For me the lightbulb moment was seeing the data model explained (in "Git for computer scientists" for example). I'm not sure this can be conveyed in game form,

For me the lightbulb moment was seeing the data model explained (in "Git for computer scientists" for example). I'm not sure this can be conveyed in game form, and githug doesn't seem to go there. With close to a hundred commands that can be composed in various ways, teaching tasks isn't as worthwhile as teaching the principles.