Hey, I remember this guy!
Glad to see you're still working on this game! No idea what it's called, but it looks neat.
Anyway, I suggest doing something more interesting with the arms sort of like they're doing here with mario -- perhaps lift that foot on the left up a little higher and bend the knee a little. You could leave both his hands open and facing forward (as if he's trying to grab you or someone else he's running after) to make him look a bit more creepy if you like, since I feel 'creepy' is the vibe you're going for. Overall, his silhouette is just too uninteresting -- his characterization is just not very clear in this image without something going on with his hand(s) or face. Since his face seems to need to be blank for the omnious look, his hands need to do the talking (or something else prominent in the scene at least needs to 'talk'.)
As far as (what *looks* like) his cheekbones/chin-shadows are concerned -- I suggest either making the 'bones' in the cheek more prominent or mixing them in with the overall shape of the round light on the bottom of the face because, currently, it just doesn't look like they know what's going on with the light source (i.e. is this ambient occlusion or is this a cast shadow?) Although, realistically, the shadows from the collar would cast a little on his face due to the direction of the light source, it's better to simplify details like this, emphasize them, or remove them completely in the case that they're not adding anything significant to the overall characterization or are simply muddying things up. In this particular case, they're not adding anything, and they've got the potential to be confusing to (most) people not savvy with lighting or cast-shadows.
Just some stuff to think about...
