About Shelf Solver GameShelf Solver is a 20-stage slide puzzle game where you fill in the grid with various items found in a grocery store. Each type of item has a number on it indicating how many items are in the stack. Select the item by tapping the screen or holding the mouse left click and drag it to slide it in any of the 4 cardinal directions. The stack stops moving when it runs out, when it runs into another good type, or when it runs into a wall. You can move stacks partially and then move other stacks, mixing the order as needed to make the spatial puzzle math work. To beat each level each item must be laid out on a square of its own & all grid tiles must be filled with items. 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.