These cards have a right order and you cannot see it. Swap two of them and the game answers with a single number: how many are in the right place. Working out which ones is your problem.
Find the secret sequence
That is it. There is nothing else to learn.
No card ever opens in the right place. The first move is always a guess.
Drag one card onto another and the two trade places. It is never a ripple down the row: it is exactly two.
The count goes up, down, or nowhere. Each answer rules possibilities out — and a move that lowers the count teaches you as much as one that raises it.
From no clock at all to a running timer with the hit count hidden between moves.
No rush and no limits. Get the hang of it.
4 cards
Six cards and a move limit.
6 cards
More cards and a clock running.
7 cards
Eight cards, and hits only flash after each move.
8 cards
Starts easy and grows every level. How far can you get?
Cards keep growing
This is a game that asks you to tell cards apart. If telling them apart by colour alone is hard for you, there is an accessible mode: each card can be shown through three independent channels, switched on and off however you like.
Every card has its own colour.
Every colour owns a texture, and always the same one.
The number printed on the card.
No sign-up, no login, no email. Open it and play.
None. No banner, no video, nothing to buy.
The whole game runs in your browser. Your progress stays on your device.
After the first visit it works offline, and it installs to your home screen.