His legs look way too short and/or his arms too long. I'd like to see what can be distinquished as his upper body thickened and his legs lengthened. Probably have his arms shortened a bit, even if you lengthen the legs. Also something to give more form to the silhouette woud be good, since it's really strange not being able to figure out the proportions.
I also don't like that his legs are so trunk like. I'm a fan of thinner limbs, I guess. Then there's the flail itself, the handle aaed to the black is hardly noticable. The aa color is just way too dark. Personally, I would've used the red shade which you used to aa the handle to the background and would've just left the part of the handle overlapping the background without aa. I think the spiked ball is really over aaed too where it meets the light gray floor, it just makes it look too blurry and BrotherInWar's edit makes it look too bulky and outlined, not really fixing the blurriness problem. Although my edit may make the spikes look too needlelike, but you could just thicken them up with the darker mid gray at the base of each spike, until the black meets said gray in the background, then you could just use the black at the base to thicken it.
Here's how I would've done it:
Sorry if somethings aren't very clear, I'm tired and horrible at explanations.
