• ✓The rule always comes before the clock, and that is the whole game — fast deciders are not thinking faster, they decided in advance what they were deciding by
• ✓Every scene has exactly one option that fits its rule, checked across all six scenes and four options (npm run verify:teenfive)
• ✓Running out is not a loss, and an off-rule choice gets no wrong-sound — the next screen explains where the rule would have led, and why
• ✓Four rules people actually live by: take the reversible path, the cheap one, the one that leaves nobody out, the one you can sleep after

✓ = done · ☐ = planned. Every game is built one step at a time like this.