What I learned from my latest iteration and what I'll change next time
Really nice way to come back to the "ice-breaker" when students start asking for partial credit etc. This is consistent with my preference for this particular ice-breaker as one that (unlike most of them) makes an important point about the course. Also: interesting point that this particular group of students might be unusually capable of the self-assessment required for full-on ungrading. I wonder if others have had similar thoughts with respect to engineering majors.