Hello everyone) I've just drawn this character design of a boy for a children comix (children 6-12 years). This have to be a short educational comix, main character is a 7-9 years old boy. Little readers have to relate themselves to him, so he will look like an average child. It total, it turned out not bad, but something looks off.... especially the foreshortened part of the body (left leg and arm). I can't see what exactly is the problem. Could you please have a look and tell me where I have a mistake?

Hello everyone) I've just drawn this character design of a boy for a children comix (children 6-12 years). This have to be a short educational comix, main character is a 7-9 years old boy. Little readers have to relate themselves to him, so he will look like an average child. It total, it turned out not bad, but something looks off.... especially the foreshortened part of the body (left leg and arm). I can't see what exactly is the problem. Could you please have a look and tell me where I have a mistake? Thank you very much!))))