You could've done so much better...
Your biggest flaw is in the dialogue. Pretty much all parts of it. The mouth animation is a loop - which looks awful, - the voice actors sound like teens trying to sound like adults (though I understand if you couldn't get a voice actor), and the writing needs improvement.
Most of the art and animation was nice, but some of your blurs were lame - you just made some low-alpha'd copies of the object and moved them horizontally. Even if you're gonna go like that, you need to remember that it needs to look like a blend, so they can't be spaced so far apart, and that blurs aren't all horizontal.
You coulda worked a bit on sounds too. Most was good, but there is room for improvement. At some fight places, there should've been a sort of dramatic sound or a woosh or something, but there wasn't.
A lame part was when he coughed. There was one new frame of his mouth wide open towards the camera and then blood, which doesn't look like blood, gets on the camera. The whole thing just looked cheesy.
Your overall presentation is good, but there's a number of things you need to change before I'd consider it great. If there's one thing I'd change, it's the mouth animation. This isn't low-cost-import anime we're dealing with here, kay?