How it's scored
A perfect circle is the same distance from its centre all the way round. As you draw, the game measures how far each point of your line is from the dot, then looks at how much those distances vary. No variation is 100%. The line changes colour as you go: green where it's on track, yellow to red where it bulges out or dips in.
The circle has to go around the dot and all the way round. It finishes by itself once you get back to where you started. Clockwise and anticlockwise both work.
Why it's so hard
A circle never stops turning, at exactly the same rate, all the way round. Hands are much better at straight-ish strokes, so most hand-drawn circles come out a little flat on one side, or egg-shaped. Try it and watch where your line turns yellow.
Tips
- Go bigger. Small wobbles matter less on a big circle.
- Keep a steady speed. Slowing down at the end is where most circles go flat.
- Watch the dot, not your finger. It's easier to keep an even distance from something you're looking at.
- On a phone, try drawing with your whole arm rather than just your thumb.