I'm not sure about the placing of the text but I think the color shouldn't be too sharp like the green you are using. Try something darker or softer (Get my meaning? :P)
I agree with Lumix about focal point. The avvy is a bit better because the text color isn't as sharp as the signature itself.

I suggest you try different font because I don't think pixel font looks good on this type of signature too imo. Not sure, but it's not a bad signature. Well done