Before I review, take into account this was made for a game jam in 72 hours. That's an insanely short amount of time to make a game, so props to you for making it in the first place.
That said, gameplay is terrible. Just fetch quests, all "go pick up ten of these". Did little to lure me into a sense of normality, it instead just sort of felt tedious.
Character designs are all generic and hard to tell apart but I like the way they speak with rising inflection.
I can forgive the 2.5D trees because I kinda like that aesthetic.
Textures are terrible, probably the worst part of the game.
I hate that something spooky is revealed on day 3, and there's nothing you can really do about it for the next couple days. Just felt kinda like 'oh, there it is'.
The ending was pretty hairraising though. Pretty neat. The darkness, the music change, both good choices. You went with a good final scare.
Overall, the limitations you had bump it up from waste of time to mid.
I think your problem comes with the premise. You spend a lot of time in the OG Animal Crossing constructing your own little world, so when something creepy does happen, it feels like a violation of your personal space on top of being scary. Here, you have little time to get acquainted, and even less involvement in the world.
Not much you could do for that, given the time you had, but I would have added a couple other trivial quests (dialogue, fishing, maybe tending to a garden), and more time to get acquainted with the villagers.
If you had any desire to, I think the wealth of comments above mine show there are a lot of people interested in you expanding on the concept.