Avoid the elements to stay alive. Last as long as you can to achieve the highest score. FOR EXPERT PLAYERS: you can stick to the walls and the roof by holding up while touching them.
Move with the arrow keys. up is to jump and hold up while touching a wall or the roof to stick
A context menu should be shown when right-clicking or, on touch devices, long-pressing in the game. This menu especially allows to play in full screen and control the volume.