I much prefer the basic composition and perspective that you have here in comparison to Is That Her?. It's much more dynamic and grabs the attention straight away.
But it doesn't really lead anywhere - having the girl leaning on the rail at the end would have provided a focal point, somewhere for the eye to travel to. With a strong focal point the pale colours of the rest of the picture would act as an excellent backdrop.

I don't find the shadows that captivating but I do like the contrast between the pale wooded floor and the stronger colour of the uprights - I think this is where the main strength of the composition comes from.

Phill