Just with a quick glance I instantly noticed more than a few errors;
1. His head is shaped like this \/
2. He's nowhere near bulky enough to be Goku, especially around his chest and arms.
3. From the side view his chest has no shape, he's totally flat.
4. The boots just aren't Goku, I've no idea where he got that idea from.
a good start, still a fair amount of flaws, the waist for the legs doesnt match the torso, and the shoulders need more definition and muscularity. Also the neck is either too long, and the face too narrow for goku, just a few crits ^_^