I don't think you should take the bottom out...
Also, added a few minor edits.
Re-done the shadow on the side of the chest, it was kinda off... shoulda covered the whole side.
And don't know the restrictions (32-bit, etc.) so only added one color (light brown).
There's only two more things I would edit, which would be recoloring the fastening (grey areas) alongside the chest.
And maybe the proportions on the bottom, compared to the top (maybe).
Best advice I got.
Other than that, I think it looks fine.
EDIT: :/ I don't know why the picture messed up... it's not saved in Jpeg.
I'll re-do it later tonight and edit my post.
EDIT: Here's the quick fix: