The game includes various playing modes: normal, where you just spot the differences at your leisure, and timed, where you need to step up your game and search quickly.
Playing the game is simple: find any differences between two apparently identical images, and click them with your mouse. But don't go clicking willy-nilly all over the image - if you click somewhere that doesn't have a difference, you'll lose points.
Once you've found all the differences, you can move to a new set of images. So the more you complete, the more illustrations you'll be able to unlock.
Anime Spot the Difference is an entertaining game with a large amount of high-quality images to enjoy. Almost all of the images are in high-def, so it's a good way to pass the time with your favorite anime.