I feel like the cut off on the body should be below the waist, closer to the crotch. Plus, tail? Does Godzilla have one? Those things aside, I think you've got a very stylistically finished looking piece.
I like how it almost seems like the wearer's head is part of the western godzilla creation! Anywho, I agree amybe godzilla should have a tail and possibly a six shooter slung on his hip, or go the other way for a perspective shootout stance with Mothra looking on the other side. Still, i really dig the concept and what you've done here. nice work my man!
Funny you should mention that FA, The original idea was that the legs would go right up to the collar, but it didnt really look so grand. That's actually why there isn't a tail either. Fair comments about the legs looking off. One should really be closer than the other.
About my design
Godzilla goes a little western for you.
Uses 5 colours plus the shirt colour.
I will post a link here and through my profile to a bigger image.