Sort: left or right, as fast as you can
Shapes arrive one at a time. Send each to its side, and the next comes at once, so the pace is entirely yours until the rule changes under you.
How to play
- Circles go left and squares go right. Tap the left or right half of the game, click there, or press the left and right arrow keys.
- Each right answer brings the next shape straight away, so the faster you are, the more you sort.
- Now and then the rule swaps and the sides change places. It is shown clearly, with a short pause. Later a third shape joins, and it follows the circles.
How the score works
Each correct answer scores more the faster you gave it, and a bonus grows with every right answer in a row. A wrong answer ends the attempt: the same shapes start again from the first, a second down the clock, and your best attempt is the one that counts, so a careful run nearly always beats a hurried one. Shapes, not colours, tell the kinds apart.
Tips
- Rhythm beats panic. A steady pace with no slips outscores bursts of speed broken by mistakes.
- Expect the swap. The pause is short, and most slips come in the first answer after it.
- Rest your thumbs over both halves of the screen so that neither side is further away.
- When the third shape arrives, remember it goes with the circles, whichever side that is now.
Questions
Do I need to download anything?
No. It plays in your browser, on a phone or a computer, and there is nothing to install or sign up for before your first game.
Can I play this without seeing colours?
Yes. The kinds are told apart by their shape, never by colour alone.
Is it harder at the end?
Yes. Swaps come more often as the run goes on, and the third shape joins part way through.