I don't see what should be wrong with it. Unless you wanted to express sth. else than the mighty strength of that sumo and the powerless feeling one would have in that poor whitey dude's place, its a success ! Also it is very cool to see sth. totally different from you ! How much time did you have ?
im not sure maybe 22-3h overall but with a lot of retake here and there , well yeah im pretty happy with the compo though it's like u said unusual and it's nice from time to time to change a bit , but definitely it's not what i like to do , i was really bored and no will to finish it properly !!