Thanks for the detailed feedback!
I will add a diagnostic mode to the game where it writes input events and how it handles them, with markers for anything suspicious.
The web version and terminal version work quite differently (the web version doesn't actually have a terminal and gets inputs from the browser, not the OS).
Steam warned me about wireless vs wired PS controllers, apparently there is some extra jank in their protocols or whatever.
Fun! Anyway, will let you know when the diagnostic mode is in