* Way too dark in the first bit...we need *some* kind of definition somewhere in the scene.
* Camera work is really weak. For example, the part where the guy jumps down off the stage...it's too shaky to begin with, and then the camera *way* over compensates following him down...those kinds of camera moves require practice and multiple takes to get right. It looks like you just did one shot of everthing.
* The lighting (or lack there of) was bad.
* What's with that fast blurring? Don't do that.
* Audio is bad.
* What was the point of the short?
* There was no story, and no ending.
* There was a total lack of editing...it seems there were a few dirty jump-cuts that didn't work, and the rest were camera fades.
* The music was the best part, and I'm sure you guys didn't write that.
This is a great exercise, and I would keep at it. As far as this piece sucking? No comment. You're too inexperienced to judge that harshly.