Enter the following passwords in the sequence that they appear to unlock the corresponding level.
Unlock Level 2 (Easy):
Daffy Duck, Taz, Elmer Fudd
Unlock Level 2 (Hard):
Taz, Marvin Martian, Yosemite Sam
Unlock Level 4 (Easy):
Yosemite Sam, Daffy Duck, Elmer Fudd
Unlock Level 4 (Hard):
Marvin Martian, Taz, Yosemite Sam
Skip Stage (Press 'Pause' during gameplay then press 'Select'):
Taz, Elmer Fudd, Daffy Duck