A short record of changes we can actually verify. No external security certification or educational endorsement is implied.
Published the official browser game with 15 sequential marbles, a maths editor, collapsible tracks, custom bounds, sliders and an unscored Formula Lab with implicit and polar curves. Player progress remains local to the browser.
Added substantive information about gameplay, privacy, school IT review, accessibility and original curve examples. Documented known limitations rather than claiming independent certification.