It looks like the balloons are dithered, but the clown isn't?
I haven't shaded the clown yet.
Most of your problems seem to come from basic anatomy issues. The sign could be more realistic too, check out this tut: http://pixel-zone.rpgdx.net/shtml/tutmini-wood.shtml
The signs supposed to be cardboard. any tips you could give me with the anatomy?
The hands are parallel with the camera, and so they look really flat.
I had a lot of problems with the hands, I still need to add shading to them, but is there anything else I can do to make the, better?
There's no real volume to the pants, the clown needs realistic shading, the position of his feet are off,
I haven't shaded him yet. How can I fix the positions?
the suspenders should contour to his body,
wouldn't the oversized pants keep the suspenders away from his body?
his hair should be more random and less symmetrical,
alright. I'll work on that. are there any good tutorials for it?
and the balloon strings need to be less randomly splayed and more realistically relax, ala gravity.
So change the missle 3 strings?
Also use less basic/primary colors and mix it up with some desaturation.
the colors are just a basic stand in right now