Not bad for a first, but for a start the shadows should be a darker shade of brown, rather than grey. EDIT: The shadows are also not right regarding the light source, the moon.
Er...thats crap. You should have thought it through alot better, and at least get a decent and funny story before you start. 1/10 Effort 1/10 Originality 1/10 Looks 0.5/10 Overall :lol:
Well like in my avatar, you could do the top of it like that and make it sort of blend in. I'm not saying do the whole lot like that, I mean my avatar took me long enough, but perhaps just the top of the pile? And another thing, the wall and phats need some shading.