I don't want to sound rude but I bet you could do a lot better than this. The spooky music and spooky atmosphere you've aimed for is there but the story and context of "it's your birthday, but scary" just doesn't do it for me.
I guess I just don't think that birthday parties are a very scary thing... locking onto a more specific situation like losing your parents at a party or some sort of social anxiety might have been better.
I would still say good, but it depends what you're looking for in a game.
Looking forward to your future work that can build on this :) Being imperfect so you can learn is what Game Jams are for :)