Press C during game play, then enter one of the following passwords.

Level	Password
1	0000
2	HTDC
3	CLLD
4	LBKG
5	XDDJ
6	FXLC
7	KRFK
8	KLFB
9	DDRX
10	HRTB
11	BRTD
12	TFBB
13	TXHF
14	CKJL
15	LFCK