At the main menu, select "Password" and enter these passwords.

Effect	Password
2-4	ZRPBD
2-5	TBJRS
2-6	KSMTK
2-7	CCKFD
5-2	PPVWP
5-5	GQCXX
Boss	MSVXH
Level 1-1	ZFNDW
Level 1-10	BNKBC
Level 1-2	MRWHQ
Level 1-3	VRMFZ
Level 1-4	DLZFR
Level 1-5	RJBVL
Level 1-6	LLCQX
Level 1-7	DZLGX
Level 1-8	NVWXT
Level 1-9	FGHTV
Level 2-1	GLFFR
Level 2-10	WXDXJ
Level 2-2	KFHGJ
Level 2-3	BZBCM
Level 2-4	ZRPBD
Level 2-8	DZQWV
Level 2-9	MDBSD
Level 3-1	ZQMMR
Level 3-10	PPBPT
Level 3-2	VJHMC
Level 3-3	FTSLG
Level 3-4	GZLWR
Level 3-5	ZCMMP
Level 3-6	GRKHM
Level 3-7	SSHTF
Level 3-8	ZLFXH
Level 3-9	LJVJJ
Level 4-1	FRGRK
Level 4-2	JVZLB
Level 4-3	PBZXH
Level 4-4	XJQJL