Boring.
Some of them were pretty damn good (Dr Mario's for example), but most of them were just bad. I can put aside the crap drawing skill, but for a collab based entirely around the concept of 60 frames per person, people really just drew a bunch of shit for sixty frames without actually creating something designed to fit the limitations.
There was no entertainment value in this, and with the lack of any kind of continuity or even some kind of unifying theme, it's not worth your time.