Hey, awesome work man!
I Respect flash artists greatly, because even their first piece of work is better than mine, i have none! So congratulations but to make this better i'd include;
1) It's great, but if you plan to make a sequel, (it's totally nerdy) but check out a bitta dragonball z. :P Spirit bomb thing.. is always epic.
2) under personal opinion I hate all that japenese stuff, and when I mean that I mean you know, ever see the way Yugioh is? it's so cheesy. Get some straight english out there! Or alternatively, dont have any type, someone said have audio, or include nothing, thats spot on.
and 3) It'll be a bit harder, but why not have a few more stickmen on screen, jumping off things and wall jumping and all. Just a thing to make it more epic!
Great submission! Congratz on underdog.