Without the yellow background there'd be no contrast and this would be a boring picture.
Nice job!
I think the yellow is clearly an important part of the piece here.
Yellow bgs are okay. White ones aren't.
Nice concept!
Pretty cool.
Reminds me of my "A Mazed" piece. ^^ I think you'll have to remove this yellow BG before they accept it. Otherwise, I think its ok!
Without the yellow background there'd be no contrast and this would be a boring picture.
Nice job!