Random + Boring = Not a good combo
Well, the preloader and the main menu were well done... and the beginning intro almost made it seem that I was about to watch a ground-breaking flash... but it was short lived.
The first flash scene didn't make any sense whatsoever... and wasn't effective as the opening flash (opening flash in collabs should attract the viewers attention right away, so that they will be interested in watching the rest)
Second flash seemed to start good but ended randomly and didn't provide anything interesting.
It didn't get any more interesting after that... and I did watch the entire animation. No plot, not interesting and it didn't make me want to watch more.
Animations were poorly done, and didn't contribute to the collab as a whole.
Not a single flash in the collab grabbed my attention, which means if you are going to continue this you all must contribute to the collab and try to make one whole, and not just many random animations sewn together into one big blob with nothing in common in between.
I gave you a 3 for the effort, but you really do need to work on this. Make it more interesting, and more pleasing to the eye, especially if hundreds of people are going to watch it.