Why is everybody's skin the same colour as the background?

Why has Andrew only got colour on his arms? and why is his triangular body naked?

Why has Dad got naked arms?

Why is Keri fully coloured in apart from her head and hat? and how come she even has a hat?...and why has Keri got fat coloured feet?

Why is the Wicked Fairy fully coloured with a fully coloured crown hat?

Why are these people coloured in with those particular colours? and why are they shaped in those particular ways?

What do the other colours in the background represent? and what do the layers depict?

What are the random black dash lines in the background for?

Maybe we will never know...