Really good stuff you have here! I loved the art, and while there wasn't enough music for the runtime, I did really enjoy the atmosphere of the song. I would say the weakest point was the sound, getting some SFX from freesound would bring this to the next level. My favorite character was probably Florence but I also really appreciated the distinct look of the priest.
I agree that 5 days for something of this consistent quality is impressive - with more time I'm sure your team can create something really stunning. Great work by you guys !!