You need to climb up the walls by pushing off or sliding along them. You need to act quickly, since the cube will slide down all the time, where it will explode when it reaches the edge of the screen. Moving up the wall, you will have obstacles that you will have to overcome in different ways. Passing every fifth checkpoint, you will encounter a wall-boss. Boss walls have their own characteristics and it will be more difficult to pass them than simple walls. The more your record is, the cooler you can use skins or abilities. Abilities will help you make your wall climbing easier. Good game!