TGOT white walker kilroy

I am horrible at draawing anything but nature, but ive had this idea for a while. ive had no experience drawing people/creatures, only trees,A group that im in is holding a winter contest, and i thought this artwork would be perfect, but i invisioned it better. I hope to win.
In the picture, it's a white walker looking over the wall in the style of a kilroy. I thought it would be kind of funny