Fun game with a cute story! I liked rescuing the pixel people from the 3D world! :)
I'll add another 'inverted camera controls were hard for me to deal with' to the pile. The other advice I'd offer is to shift the camera position a bit. It shouldn't be directly behind the knight. If the player lines the camera up looking exactly straight forward, all they see is the Knight's backside! I think the traditional spot for the camera in a 3rd person game is just over the character's left or right shoulder.