Clear the board

Play each of the four games from this phase once: Latency Budget, Cascade, Selector Hunt, Layout Arena. Record your score for each.

Compare against your first attempt. The improvement is the phase, measured.

More useful than the scores: note which specific shapes still make you stop and think. A cascade situation involving layers. A selector needing a structural pseudo-class. A layout where you hesitate between flex and grid. Write those down and put them in your checkpoint write-up, a person reading it will tell you exactly what to do about each one, and that is worth more than a higher score.