About Knife Jump GameKnife Jump is a vertically scrolling platform jumper. Tap your mouse left click button to the correct level and release to have the knife jump straight up. Each jump you land is worth a point. If the knife hits the top of the screen or does not fly far enough to make it to the next platform you lose. 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.