The long jump is a technique that lets you leap a large distance, depending on the speed of your character and whether or not you use a double jump. Unlike normal movement that you see as you walk across the stage, the long jump consists of an air dash that lets you move slightly faster than you normally would. This allows you to cover distances faster, and help you score that one hit kill faster.
To perform a long jump using the keyboard:
To perform a long jump using the mouse: