Hello, I am me and I have been playing hacked roms since the days of Nesticle and Super Mario Wheel Chair... ...which btw I think deserves a come back!
I have only dabbled in rom hacking, am better at providing ideas and inspiration, and good for testing too. Among my favorites are Super Pitfall Anniversary Edition, Zelda I and II redux, Bionic Commando Uncensored, and that sort of thing. And also DOOM, I work with DOOM editing extensively... ...from time to time.
If you hold down the attack button, then her knife is always out and never withdraws to give the effect of a stabbing action. I've no idea how to do it or if it could be done, but if that knife was animated it would make for a nice change.