Level select:
Press Start at the title screen to enter the options screen. Set the lives option to seven, continues to four, and Arthurs to two. Set the sound test option to "Teleport" and press Start. Pause game play then press Select to display the level selection screen. After the game ends, hold L + R to reactivate the level selection screen.
Level skip:
Hold L + R during game play to advance to the next stage.