About Spot the Difference The School Mystery GameSpot the Difference the School Mystery is a 21-stage image comparison game featuring classrooms and hallways. Stages can be played in any order. Use your mouse cursor to move around the images and left click to select wherever you find differences. Find the required number of differences in each scene to complete it. Differences can include extra items, missing items, color differences, shadow layering, and so on. Finish quickly and click accurately to earn up to 5 stars on each scene. Go back and replay previously beat levels to try to earn a higher rating on them. This is a JavaScript web application which uses cross-platform mobile-friendly HTML. All modern web browsers like Microsoft Edge, Apple Safari, Google Chrome, Mozilla Firefox and Opera should support it. This game works on just about any type of computing device including Microsoft Windows desktop computers, Apple OSX Mac computers, iOS powered tablets and phones like the iPad and iPhone, laptops like the Google Chromebook, and the many types of mobile phones from manufacturers like Samsung which are powered by Google Android.