It's obvious you put some work into this, I think it has an interesting atmosphere but is held back by how flat it looks. I think maybe adding some shadows and some animations to the scenes where everyone is standing still talking would help add a lot, you could also have the camera really really slowly panning in and out as they talk, even if it's from far away having some more movement would help a lot I think. I also think you need to add some close-ups, and maybe even think about finding voice actors. As I was watching this I couldn't help but think how much it reminded me of an animation in an App Store game or something. The sounds effects are sparse but well done, and the motion in the action scenes is pretty cool. Good job :)