It runs great for me, I'm not sure if that says anything. The load wasn't very long and I didn't notice any "sticky keys" of any kind. But there is something I noticed: when you first start you don't have ammo selected, but if you fire it still kills enemies. I tried this again, wasting all of the ammo before killing the enemies, and it still killed them. Is this meant to happen, like a backfire damage kind of thing? The game looks cool though, and I'm looking forward to your next work!
VGMGambit
Also, what is that meter with the sword icon for?