I found all the cats on floors 1-5 as well as the bunker. I think I got the Fofino ones out of order though - I didn't realize I hadn't gotten him on the 1st floor, and proceeded to second floor...
I got everything else, and still nothing is taking me to the roof.
I used "delete save" in the settings menu, and re-played from the first floor, and made sure to find Fofino on each floor before proceeding, and still nothing.
I got the main menu cat. I got he setting menu cat. I got the credits menu cat.
How do I get to the roof??