Two trails, one finger. 1 → A → 2 → B → 3…

Numbers and letters take turns, so every single tap makes you drop one rule and pick up the other. Trails grow longer as you sharpen — and past Lv 12 the letters run backwards.

Your first trail finds your level: it gets longer on purpose — reaching your ceiling IS the measurement. You can't fail a calibration.

🔓 Next unlock at Lv 12: Backward letters — The letters run Z-ward — the alphabet chant stops helping you