I know it's a few years old now, but I was curious what people thought of this game. My roommate could not get too far in it before he lost interest, mainly cuz of the hack-n-slash gameplay, and I kinda agree this is its only downfall, but when u really play the whole thing it has some very varied gameplay styles, with 2D platformer levels, puzzles, etc. The gameplay isn't as flawless and fluid as it could be, but it's ok.
I was able to finish it mainly cuz of the insane visuals, which this game was made to show off, I think. It's a very cool, artistic game that prolly couldn't have been made during any other era of gaming.
If you haven't tried it, I do recommend it. I was able to blow thru the normal mode with no sweat whatsoever, it starts out as a hack-n-slash but there is some variety to it, u just hafta keep playing.