Uneasy....
This is a great teaser for an upcoming series, although I'm kind of disappointed that it wasn't longer. If you had added a few more scenes, you would have nailed it home. I particularity Like that twitching ghost thing though I was slightly disappointed when you fully revealed it as nothing more than a head and little transparent body. What I think you should do, is to not fully reveal the monster or ghost next time, but always hint towards it's presence. This would create more tension for the viewer as they would not know what it really was. You should show some more shots of the girl next time as more of a focal point since I presume that is Karissa.
I really enjoyed the windmills since they seemed to be the one image that people will think of when they see this teaser. If you were going for uneasy, than you have achieved it well. I'm excited to see whats next!