I like it but he doesn't look alien enough to me. Maybe with a bit longer neck and not such human shaped head. I can tell the arms are very thing but only at one point. You have to notice it to tell the arms are not human.
well, basically it's based on Human body it's always a reference but things are pushed a bit further . and as you know you can't go out of the structure of muscles and bones . and the proportions i've used can't be applied to human body or it will look very weird .
anyway thanks for the comment . apriciated . cheers