Besides what DJ already said, I have only one more suggestion.
The sword should be more centered on the "Z" by using the inner points of the "Z" as references or just that middle white dot on the "Z".
Does that make sense?
My problem with it is that, to the bottom left of the sword I can see some background while at the top right of the sword there is no background showing. This because it is not centered on the "Z". (I'm probably being over-explanatory here, oh well)
Btw, I really like the sword style! ^_^