Thank youuu. I wrote down a bunch of things you said. Also, you approached quite the game differently from other people, so it was interesting to watch you play.
Regarding inertia, you're probably right, but movement would visually look worse without it. Like more retro, it isn't exactly what I'm going for. There's no inertia while shooting, so I'm kind of relying on the fact that you can hold the shooting button whenever you need precision.