Press arrows keys or W A S D when the arrow of the bottom reaches the top arrows. Press up or down arrows to move through the levels. Press space or click on the level to do it. When you're picking levels, press left and right on the level to change the difficulty. If you die, press space or click on the retry button to retry the level. Pressing other keys will take you back to the menu. We gettin' freaky on the friday night yeah.