As a flash, it was pretty good overall.
Nevertheless, I think it seems a little too cliche. I'll have to see the full version, because what was revealed about it was fairly confusing, but it seemed to rely on too many stereotypes; ie. the whole tank people, spaceship, heroic main character, apparent good vs. evil conflict, etc. I may have misunderstood stuff though, so I may be wrong.
The overall concept itself didn't seem cliche, because I didn't understand it at all. From what I saw, I gathered that the humans were the elves slaves, they rebelled, and the main character is working against that? Huh? I guess it seems interesting, but I think I misunderstood it.
Anyways, good job.