RollerCoasterEP1 1st the animation flaw that i noticed was the mouth animation it was executed poorly.
2nd some of the characters are extremely typical some are unique but not very appealing to look at.
3rd Don't you think that guy with the sharp teeth somewhere at the beginning look like the guy with sharp teeth from Naruto?
4th ... Cat ears? Seriously? I don't think it suits the poor guy.
5th The animation is quite pathetic in my eyes I can see some anatomy errors and I myself ain't good at anatomy! Get some lessons on anatomy and you'll go far.
6th The voice at the beginning is way too quiet
7th And that guy from the beginning is kinda demonic I understand that but his design is way too typical.
8th the beginning part with Kai is also typical where he is all lazy
9th The music is alright sounds like something from a movie.
10th The subtitles are unclear your backgrounds overwhelm it with it's brightness.
11th the story I don't get it I missed out a lot of things because of your little subtitles but you said it will be explained in time so I guess i can wait.
I praise you for going for frame by frame as most newgrounders know that is really hard.
The camera angles were decent enough for me to say like a anime...
And finally I'd like to thank you for your hard work!