I love the contrasts that you put into your work. The pumpkin looks really excellent too. It must have been hard to make it glow like that. ^_^ The girl holding the pumpkin looks really sinister looking.
Don't put yourself down; you did very well with a difficult, but necessary, colour palette. In fact, I like the effect of making the people and room look as if they're made from glass, while the pumpkin seems so organic & alive. It adds to the spookiness.