Very nice!  Thank you for this nice character! If you would add a 2-frame jump animation with moving hair, this would be a perfect, complete character set!

just because you reference killbill it may be a licensing issue. Just like you cant freely license a harry potter character you cant do that with killbill either. I would leave out the killbill reference entirely.

Agreed. Although the design is generic enough to not be a violation of copyright, calling it the "Kill Bill girl" could be. I recommend you rename it. You could maybe mention that she's similar to or inspired by the character in Kill Bill in the description.

Thanks for the license, EXCELLENT product, will not miss the quote in the credits of the game.