Find all 5 differences. Tap them in either picture.
Find all 5 differences. Tap them in either picture.
There is no clock and wrong taps cost nothing. Each round has a few more, and smaller, differences than the last. With a keyboard, Tab into a picture, move with the arrow keys and press Enter. Nothing is saved: the stars last only this visit.
Careful, systematic looking and visual memory: comparing two scenes part by part, noticing small changes of colour, size, position and number, and keeping track of what has been checked.