[snip596]

Awesome visualization, but it seems to deviate from how git works in a few instances. Take "level mixed2" for example. The initial branch checked out was "caption". I did "git rebase -i master" and picked both commits (no re-ordering). That created C2' and C3' which is not correct. C2' wouldn't have been created because it's the same tree as C2 with the same ancestor.

I had other issues with that level as well. It seems to be teaching inefficient habits by forcing strange rebases rather than a single one with an "edit" on C2. I understand this might be a limitation on the (really cool) visualization, but maybe those levels shouldn't be included if you can't show the most intuitive way (at least to me) to accomplish the goal.

Otherwise, awesome work!