I love platforming games, which are my favorite genre. And I love 2D side scrolling games.
So I am excited about this game...but it does not look as innovative or cool as everyone is making it out to be.
The best part that I notice is that the game gives weight and uses physics throughout its level design very well. As the most innovative in game concepts.
Other than that you have cooperative side scrolling puzzle platformer...that has been done before.
Create your own levels, that has been done before, and I really don't get too excited about having to design my own game, I don't find that fun.
This game is going to sell to Niche audience like Blast Works did, some platform lovers, and finally it may have a younger audience appeal...but that audience barely exists on the PS3. It is going to completely fail at catching the PS3 mass market.