Looks nice
Well, if you're going to make one thing with no background or sound, this is the way to do it. Granted, it's still not good, but better than most submissions like it. I think my favorite part would have to be how the main character has a Tron like appearance to him. It's hard to tell what's going on, because there's no sound. Even if it was in a different language, and I couldn't understand the dialogue, I could hear the regular sounds.
It was kind of hard to see the whole way through, because not a lot happens. There just isn't much of a reason to root for whoever's in this. The animation is actually good in this, especially with the explosions. It's not bad for a test. I think that you should turn this into a full fledged flash, as I imagine it would become more popular.