Each time you touch image, the camera angle change, there is one alteration, find the difference.
Spot the common object between two different images.
Correct the difference seen from different camera angle.
Shout difficult Japanese characters.
Spot the difference of symmetry design in the clothes.
When you touch left side of screen, left character jumps. When you touch right side of screen, right character jumps.
Shooting game like billiards.
Jump over holes.