For a level with lives of 6-12, write in the password of the level:

03 - The Forest F+8T2
04 - The Town L69KL
05 - Mountain 1 C+9J3
06 - Mexican Village JB629
07 - Mountain 2 T8829
08 - The Hospital QB6W9
09 - Undergroung Passages CXNMS
10 - The Amusement Park JJH2W
11 - Space Land PLB2W
12 - The Spaceship L8GWB
13 - The Pirate Ship MXTWV
14 - The Haunted House N1VM1
15 - The Flight Home PZ1M1
16 - BONUS LEVEL GH9M0