About Fill Line GameFill Line is a 36-stage spatial logic puzzle game. Use your mouse left click button to select the block and move it around the playing field until alll squares on the puzzle have been painted. You can not cross over previously painted squares. If a square has an arrow on it you must enter that square from the bottom (or tail) of the arrow, and can then exit in any direction. Completely paint the level to unlock the next. 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.