The right arm(characters left arm) is much smaller than the left(right) one, i don't know if it's supposed to be small or not, just though i'd point it out.. And since his head is shaded(shadow like thingie from the cape i guess) there should be some kind of light source somewere behind him or on the side of him but the treasure thingie doesn't look very shaded, i mean, not that i can see.. It's as white on the right side as it is on the left side. I think it would look better if the knife were pointing down instead of up, i think it would make it look more like hes holding it forwards in stead of more to him self. Maybe make the wall look more random? My english may be bad here and there, i hope you understand what i mean anyway.