Hold R and press Up(9) on the title screen when the current difficulty level is displayed. A sound will confirm correct code entry. Begin game play and press Start to pause. Hold R + A + Select. A number will appear in the lower left corner of the screen. Press Up or Down to select a level. Note: Select levels 11 through 17 to play one difficulty level higher than the one displayed on the title screen.
Low volume music
Enter the sound test screen and play a selection. Press R to lower the volume.