aight, tried a lil of knack at best buy...they had a demo set up...breakdown: *disclaimer - it was only like half a level i played*
gameplay - simple....for the demo, only 2 buttons did anything: x for jump and square for attack, figure you gotta unlock other shyt...there are some collectable shyts in the game ( i gained 2 things in the short time i played) that increase powers/abilities...you can break a lot of shyt in the game which makes you grow in size; as enemies hit you, shyt falls off you making you shrink in size...that shyt looks cool as hell...
difficulty - i found the part i played to be easy...there were like 2-3 enemies at a time with different attacks...will say i can see how the difficulty might catch some one off guard, especially as the game goes on....cause the enemies follow you with their attacks...the ones that shot shyt from a gun at you (some glue like shyt), follow you while shooting...you jump, they shoot up, you run left, they shoot left, etc....and it doesnt take much for you to die....this cat that was playing it while i watched died twice, then gave the sticks to me...
graphics - the game looks beautiful...it's bright, colorful, very detailed....you can see all the lil shyt that makes up the character of knack, no matter the size of him....
sound - didn't really hear any music, but you can hear the effects of the weapons the enemies used and them talking clearly