had some interesting ideas, I thought [spoilers]
Disclaimer: I'm not a horror buff. But, this had some interesting concepts going for it, I thought. Though it didn't all come together well. Some bad acting, a bit confusing...etc.
But to me, I like the idea that they really were just 'fighting to survive' after the bus wreck, and it was all manifested in a frightening, dead-end fight-to-survive via being stalked by a crazy murderer, in horror film style. I've certainly seen other "ta daa, it was really just the last moments inside this person's mind while s/he was dying!" twists before, but not done in a horror movie...where the whole running-from-a-creepy-assailant-in-a-creepy-setting represented an altered state of that struggle not to die. Not me anyway. But it's a cool idea. Death might be distressing and horrifying, after all...at least a painful one...
Also I liked the idea of an abandoned amusement park. Haha. I liked the scenes of the kids running amok and playing in it...that WOULD actually be fun, wouldn't it? Playing all the games, riding rides -- haha. Just wasn't a setting I'd seen before. And the mirror room/maze...I got a kick out of that. That carnival attraction IS so f--ing annoying for anyone who's been in it lmao, and it would be annoying trying to outrun a murderer in that. Dumb choice to go into! And the fun house, another clever thing, even the haunted ride...so again... I liked the idea of that setting to play with for a horror movie. And it could be the backdrop of a fevered dream/nightmare/last moments...or as some kind of nightmare-ish inbetween state between life and death. going from something possibly good/fun, and it turning menacing and not something you can escape, as it goes on. It also could be that allure aspect...of wanting to just 'give in' and death looks alluring...but then comes the fight.
I see the amusement park and that level of reality either as all in the kid's head as the last moments before dying, that struggle to live... (particularly the last male kid's head, because he's the one Tony Todd talked to and put weirdness inside his mind that would fuel this dream state) or as some actual in-between-netherworld right before death that people get stuck in out there after a crash as they die...etc. I like my first interpretation better but can't rule out the second.
So yeah. Overall -- a bit confusing, not great acting from everyone, some awkward pacing/editing... but some good ideas that I personally hadn't seen before. I also liked the character development of the teens and that they were a group that weren't necessarily friends but stuck on that same trip.