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Crease

Adding up · 30 levels

Fold the number strip until it matches the target.

How to play

1. Tap a crease to fold the strip there. The shorter side flips over onto the longer side (equal halves: left flips onto right).
2. Numbers that land on top of each other add up. Match the target strip exactly, reading left to right (a backwards copy does not count).
3. From level 16 the paper's back is red: a folded cell subtracts, so a cell becomes bottom − top.

Look at the target's length first: it tells you how much paper has to be folded away. The arrow under each crease shows which way it folds.

Open Crease

Teeter, Tint and Echo Heist are free starters. Other games unlock through earned game choices or permanent packs. Your progress stays in the browser; optional sign-in saves it to your website account.