Okay, where should I begin? I've watched the movie at last and I'm utterly in great disappointment. I expected Secret Door to be better than Pearl Princess since it is based on a book and is the Autumn-released version. Seemed promising. Not to mention from the 2D animation, the Barbie is very attractive and beautiful. Unfortunately, it is worse and I even won't watch it twice in a long period.
On scale 1 to 10, I rate it less than 1. The colour is the main problem of this movie, Zinnia kingdom's colour to be precise. Zinnia's colours are extremely hurting my eyes. The grass' colour is not green but blueish green, the plants and the creatures' colours are unnatural and clash making them terrible. Sure you can say that it's a magical, imaginary kingdom, but at least you can do a matching colour combination. Striking purple combined with yellow and green? They are inverse colours. You want to make it unique? Take a picture of The Lorax's Truffula...