Very comedic approach and loved the 2.5D style.... The art and music were very fitting for the type of game. I have some feedback / comments for you!!
1) The sound effects can get a bit jarring when yelling at multiple birds at once. But it could easily avoided by only yelling at a few lol
2) It's kind of hard to tell if the animals went through the door. It's almost as if im watching a billiards ball almost miss the hole and then suddenly the animal would walk itself in. Maybe a SFX or some sort of indication would be great!!
3) The day and night cycle. Wow. When those lights flick on at 5PM. Dat immersion though
4) The music for the start up seems a little muffled but I am not sure if that was intentional to simulate being inside somewhere. It feels like someone rolled off all the high frequencies on an equalizer or something.
Again, great entry and thank you for such a great experience! Unfortunately, my zookeeper got fired..