Perfect Circle

Think you can draw a perfect circle freehand? Click (or tap) and drag to draw your best circle, then see how close you got. Your best score is saved so you can keep trying to beat it.

Best: --
Click and drag to draw a circle

Key Features & Learnings:

  • Freehand drawing on HTML5 Canvas with mouse and touch support.
  • Mathematical circle-fitting algorithm to score accuracy.
  • Visual overlay comparing your drawing to the ideal circle.
  • Best score tracking with localStorage persistence.

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