Classic mode:
Enter CLSS1281999DBM as the password.
Level passwords:
RTJNPBKCX2RJPW - Venus
WWYXTC2NQW79VY - Earth
?WZ4VCLN4W81V? - Mars
RSSN3QJ78?GJMC - Jupiter
WSPZMSO8N?H8NF - Saturn
CV1?QWKGJ3X8R5 - Uranus
HV27RW1GN3YOR7 - Neptune
MV7HRCLHS3ZSR9 - Pluto
RV8RRC2HX3?RJC - Invader Homeworld