Very cute. I just have a couple of notes about the tutorial:
- "drop a tool" came off as weird wording to me (as I tried to literally right-click one of the tracks in the briefcase, thinking it'd fall out; yes, I got confused, but the wording threw me for a loop!). I'd recommend "deselect" as this is the most common and clearest term for this action.
- At the end of the tutorial, it says "that were the basics" instead of "those were the basics."