Lol, You used those crappy arms Habbo made for body guards.
They look terrible and makes it look like an arm dissapears.

The jail;
The bars are simple, don't look 3D at all.
The part at the bottom is terrible, you used too many black lines, try to use a darker/lighter colour instead of the black.
Only use black to outline/define your alt.

Overall - 6/10 Needs alot more work