I like it, BUT australia was the only continent where the bow wasn't used by the native people.

I like it! You should probably give the character a more Aborigine look to him tribal markings, piercings that sort of thing and have the more traditional weapons of a Aborigine Warrior. I can see you used the boomerang as a body for the Bow inventive, but the character can still use work in a sense but it looks great! ( I am not trying to be a jackass about it, I'm suggesting some cultural background to make the character more distinguish and more influenced by the people that raised him....but that's what I think can be done, if not ok I'll just keep my opinions to myself but I'm just some guy giving his 2 cents into the melting pot. Just be yourself and do what it is you do best!)

Very nice.