Was the guy drawn in MS Paint? I ask in all seriousness... I've done quite a bit of work in Paint, myself.
It's certainly a cool piece. There are just two things that stick out to me... One, literally, the neck. It's too long. If that was intentional, that's all well and good, but if you were going for anatomical accuracy, yeah, it's definitely too long. Two, the shaky line quality of the manakin, in contrast to the sharp edges in the rest of the piece. I think it would look much better if the manakin was cleaned up and given the same crisp line quality as everything else.