Interesting
Here's a random and probably unhelpful suggestion - when you're showing the ruined buildings the camera does some very odd focusing, like it seems to rush to them then pull away slowly or zoom out then in again. Some slow panning combined with a slow fade might work better - it gives your audience time to try and figure out what it is they're looking at rather than throwing it in their face, it makes it more involving. Does that make any sense?
Anyway, your promo is interesting but not enough to make me watch out for you finished film. There's very little story on show here so I'm not sure whether it'll be my thing or not. Your artwork is very good but it looks scanned - or at least bitmap - so you need to figure out how to turn it into lots of individual symbols so that you can animate it. That's going to be your main challenge to start with.
Good luck!