At the main menu,choose "Continue", and at the password menu, enter the following passwords to unlock these cheats. If you entered the password correctly, you'll automatically go to the "Select Chapter" screen.
Level Select: 9??92?
Unlock Easy Levels: ???91?
You know how it is hard beating every level,boss.Well,if you have this game i have good news.Ican get u to the last level.Enter this code when you go to continue:???99?
That should get you to the last level.i don't know how to beat it,but just keep trying.