How to play

Two scenes appear, one above the other on a phone and side by side on a wider screen. Tap either scene wherever you think something has changed. A correct tap marks the spot in both scenes; a wrong tap costs you two seconds.

The five change types

• Object missingAn object present in scene A is gone in scene B.
• Colour changedSame object, same place, different colour.
• Size changedThe object grew or shrank noticeably.
• Object movedThe object shifted position — often the hardest to see.
• Extra objectAn extra object appears that has no twin.

Scoring

Three stars means you beat the target time with no hints. Using a hint costs a star, and five or more wrong taps costs another. Hints highlight the region a difference lives in — they never reveal the change itself.

Get faster

Scan in horizontal bands, top to bottom, instead of jumping between halves. Count repeated objects: a mismatch in count is a free find. And save your hints for the last difference, which is statistically where everyone stalls.