Finding Cat Eyes
If you have problems finding Cat Eyes, press Y to use your cat vision. Some of them are hidden behind posters and other objects.
Allow the game to idle and Catwoman will do a dance.
Level 1: Dodging bullets
While on the level 1, there will be a hail of bullets. To dodge them, hold L and run around. The chances of you getting hit will be decreased.
Midnight the cat
Finding Midnight gives Catwoman nine lives.
The code to unlock the vault is 1940. This will unlock new galleries and a new comic book cover.