Enter at the password screen:

T=triangle
x=x button
c=circle
s=square

1st world
lv2.CCCTXSCX
lv3.SCSTXSCX
lv4.XCXTXSCX
lv5.TTTCXSCX
lv6.CTCCXSCX

2nd world
lv7.STSCXSCX
lv8.XTXCXSCX
lv9.TXTSXSCX
lv10.CXCSXSCX
lv11.SXSSXSCX
lv12.XXXSXSCX
lv13.TSTXXSCX

3rd world
lv14.CSCXXSCX
lv15.SSSXXSCX
lv16.XSXXXSCX
lv17.CCTTSSCX
lv18.TCCTSSCX

4th world
lv19.XCSTSSCX
lv20.SCXTSSCX
lv21.CTTCSSCX