Wow, really good.
I do like sprite movies and this was a good one :) If you took your time and made a longer one, you should end up doing a GREAT animation. Just one thing, I noticed that on the fire explosions you left some color from the sprite sheet. You should avoid that so the animation looks a little bit cleaner, it doesn't make the flash look bad, but it doesn't make it look good either. You're a great sprites animator :)