The duck was my fav so I made sure they were in the screenshot!
I did find the other door, but at first I didn't realise dashboard was a button to see progress. With the building, you can walk out while the menu is still open and I got a few bugs that way with menu objects remaining on screen (I liked the "I didn't make this bit" notices though!).
I think I saw a message in game about collecting the small ones first, but I was just going for whatever I could catch so maybe I didn't play correctly sorry!