Sorry for the instant kill of project. An axe version though. That would take some serious optimization.
The only way I see an 83+ version is if there were fewer enemies and a lower frame rate. I'm trying to optimize the bullet/enemy hit detection which gets run 1,800 times per frame in heavy traffic and I've only managed to pull out ~70 t-states, which is 1,800*70/15,000,000 = .0084 seconds per frame. That's about 8% faster overall, but not the 200%-300% needed to put it over to 83+.