It's a horror without the horror?
You said that the real horror will begin in part two. I could almost live with that. Almost, as the file is pretty small, so I guess you'could've waited and finish 'part two', and just make one bigger movie with that. Then it'll at least have the horror. And that's what you want people to watch your movie for, right?
You also said you didn't want to add music, to make it feel more like a horror. But when you'll think about it, every horror as music. You may not really notice it, but in almost every scene is music.
The last thing I'd like to say is that the colors were...colorful. Maybe you want to make your movie a bit darker. That would make your movie a bit more horror-like, and you don't have to draw as much, as a part of it will be...dark.