This was an alright submission and it mostly works because the animation is pretty good. I am in fact surprised you managed to get the whole thing done in that amount of time. I do think that you should probably look for longer periods of time to work on your stuff. The music was pretty interesting and high spirited as well. I have no idea what is going on or who any of these characters are. I am going to assume they are all original characters.
The way the characters moved so fast was kind of funny too. I am not sure if that was intentional, but it's a bit entertaining. You should probably put in a little more detail, though. The background feels like it suffered the worst from a lack of detail. If you shape up on the animation and make it a bit longer, I can see it being much better.