It was fun, but there were some issues I had with it.
The ending actually wasn't one. It changed the tone for sure, but I still found it really funny, especially with how absurd and dark it all felt.
The issues I did have involved some of their storytelling. The use of multiple PoVs was neat, but I don't think it served any real purpose. I don't recall any moments where seeing the events from a different person's perspective shed any light on the mystery. Especially because they just came right out with the source of it all when the witch showed up at the principal's house. It felt like they were trying to make things seem a lot more complicated than it actually was.
There was also a good bit of characters and moments that didn't really do anything to further the story. Like the drama with the cop and his fiance seemed completely unnecessary (and her happening to be the one to run over the principal... like, why?). I feel like the time that was spent on the multiple perspectives could have been better utilized actually fleshing out these moments and giving them more purpose. Because it just felt like superfluous drama for the sake of drama.
And what was the point of that dream with the gun in the sky? I thought it was going to be some ham-fisted metaphor about school shootings, especially since the main kid was bullied by others. But nothing after that really fit with that dark theme, so it was just a complete red-herring.
Sorry if it's all a bit overly critical. Just watched the movie on Halloween, and there were things I did like about it. The atmosphere was really good, and there was some actual good suspense throughout the early to mid portion. The script really could have used some revisions, though.