FillMarkTap is a timing game built around a filling ring. Color advances slowly around a circular track while a white mark shows the target fill level. Tap when the fill reaches that mark to score. Tap too early or too late and you earn a mistake. Three mistakes end the run. Watch the progress carefully, compare fill against the mark, and strike in the narrow correct window. Higher scores speed up the fill, leaving less reaction time and less room for error. Patience and precision matter more than constant tapping as the fill race becomes quicker and stricter.