first chop ever

referance;http://img11.imageshack.us/img11/1474/tutcar.jpg
My first chop ever;
http://img11.imageshack.us/img11/3609/1stchop.jpg
please give constructive crit.

It Looks aiite
The chop pic it's kinda blurry from behind

Im not sure where 2 start. plus i dont wanna b 2 harsh. dont wanna discourage ya either. but the rear tire swap needs work. And the entire chop is 1 big pixel. u r on the right track. just need 2 clean it up. heres some advice. ifyou think you r done your not i had trouble ditherin pixels too. you can use ps to fix any jagged lines easy and fun(Use the line tool at the very edge of the jagged parts to blend it all together). the tires make the walls and the side where the treads are the same size and color(or darkness). keep chopping every chop is better than the last.

thanks alot