Absolutely BRILLIANT
I absolutely ADORED the idea. One common "soundtrack" and authors free to make whatever they want out of it.
I also noticed that, if not all, most authors came with somewhat ressembling ideas to represent a certain sound, e.g. the "lalalalalala" sound is most of the time a tounge-showing character taunting another.
Animation quality was different, and even if some might say "X animation was better than Y", in my opinion they were all good because they were built around a random sound with total freedom. Good job to everyone