I didn't have anyone to play with, so I just played it by myself. The colour matching aspect makes this a really interesting variation on Tetris, and honestly I don't know that you need the co-op aspect for that to still be true. I think I would've enjoyed even more a single player version where I only had to worry about one block at a time, and it'd still be really difficult!
(I know the theme was teamwork, so that kinda limits you a bit, but the idea has potential even as single player)
Oh, and for an arcade style game like this, more juice is always good! :D
https://www.youtube.com/watch?v=Fy0aCDmgnxg
(-Joe)