Players can begin by selecting any of the three levels in geometry dash subzero . To get a feel for the game's controls and timing, it is advised that players begin in ascending sequence of difficulty for the optimum experience. The character is controlled by the player by clicking the left mouse button or the spacebar to make him leap, and holding either button for a series of hops. It should be mentioned that because the button behaves differently based on the character's form, this control method won't be constant throughout the level.