Nice one, I really liked how simple yet fun it is. Loved how you tried to implement narrative in many ways in here, although it didn't make sense for vampires to run around during daylight, the time changes were still a nice addition.
Adding the Halloween mode was a very nice touch, but you could even call it a hard mode, since it is harder to spot those vamps this way. Would like a cutscene skip button, as currently the urge to replay and improve score is very high, but having to wait through a long cutscene plays against that.
Liked this one a lot, it tried to be a full gaming experience, which I really appreciate.