Perfect Circle

How to play

Draw a circle in one stroke with your mouse or finger. The game measures how far every point of your line strays from a perfect ring and scores you from 0 to 100 percent. A dashed ghost circle then appears over your attempt so you can see exactly where you wobbled. Tiny doodles are rejected, so give it a proper sweep.

Tips

• Draw big. The score compares wobble to your circle's size, so the same hand jitter hurts less on a large ring.
• Move fast and smooth, swinging from the shoulder. Slow, careful strokes collect more jitter.
• Keep one steady speed all the way around. Speeding up mid-stroke flattens the arc, and that is what tanks scores.
• Close the loop. A big gap shifts the measured center and drags the whole shape away from round.