Hold to go up and let go to go down. The controls are reversed when upside down. You go up and down faster in mini mode. Press P to pause and unpause.
Geometry Dash wave challenge. There are a few bugs at the moment, such as the hitbox trail not working properly when paused, portals lowering accuracy, and accuracy running when paused. The challenge itself isn't finished either. Anyone can remix this and create their own wave challenges!