I like the grungy background and the use of the fractal on the right side of the signature, but the text could use some work, try making it a bit bolder, not too much bolder though, the border is good, but it might get old so try some new ones, the lighting is spot on , just try dabbing a bit of darkness around the bottom of the robot. Keep it up.
It looks like he has 2 different pairs of arms and heads...one looks like it's looking down and the other is the rocky part look into a hand shaped thing...
Yeah, I broek mien, so I had them replaced. Apparently they didn't realize the name on the jar was abnormal, not Abby Normal. (lawls)
I like everything except the random green lines, they dont go with the sig at all, and IMO kill the whole thing. Maybe try without them, idk.