Interesting game. My only gripe is that it's made in Unity, but then again, I've played a few games made using the engine.
Unity and Unreal of the modern day are just not the best in terms of optimization for low-spec (and that's coming from someone who posted his specs himself).
While I'm not for using Wayland (as I lean old school with XLibre), I heard Niri was nice for being a scroller. Unfortunately, there isn't such a WM for X11, but I'm fine with manual tilers like i3 and LeftWM.