Not bad, but there is still what to make better.
1) Add some backgrounds, it looks much better than a single color.
2) The intro is too long. It's little bit boring to watch how the planes are relasing bombs on those houses. Make it shorter.
3) Add sounds.
4) Add music.
5) Re-draw the houses.
6) Make that you can skip the intro for those who don't want to watch it.
Good luck
Camper
Say hello to my little friend.