Instructions and evidence limits
❄️ Visual detail at speedTwin Flakes
A few snowflakes flash one at a time, each in a different spot around a ring. They say no two are alike, but here two are exactly the same. Your job: say where the twins appeared.
Every flake in a round is the same colour, so colour won't help. Look at the arm tips, the branches and the centre.
After the last one, tap the two spots where the twins were.
Take your time answering. Each round starts when you tap Go. When you're finding the pair reliably, the flashes get shorter; when it's hard, they get longer.