Restart level:
Pause game play and press L + R.

Level select:
Enter LVDYK as a password and return to the title screen. Highlight the one player option, hold Left + L + R and press Start. Press X, A, L, and R to select a level, and Start to begin game play.

Level	Password
6	SMPSN
11	CVFTZ
16	BPQGY
21	TRQCZ
26	CQQSH
31	STFVF
36	DJZZZ
41	BLBJN
46	DFLTQ