In my little video review, I give my thoughts on Rayman: Origins (There's also some additional stuff after I'm done talking about Rayman, but the game stuff comes first)
Now - one little thing I didn't get into in the review - is that if you're going to beat the game - and save all the Glade Kings, you may end up having to do a lot of back-tracking - more than your Mario Galaxy - probably closer to your Mario 64 "Get All The Stars If You Want To See The Ending" level.