No preloader, one sound, no music, shortly:
I think that this is a really great start so I will give you 4/5 ...
The only problems are the graphical quality and some movement issues on the stick man. a good plus would be the space ship movement and the fact that you added sounds to the animation. Oh and the story looks promising.
I'd sugges searching for tutorials on the internet to help you make better animations (that is how I learned a lot of things too)
Keep up the great work and you will surely be a hit.
thanks, I appreciate the fact that you gave an actual review and advice :D