Thanks for playing :D
“Retro” theme is represented in “Old Wild West” vibe, not artstyle itself :D
As for UI responsiveness, can’t really pinpoint to cause of that either. But, probably, nothing to do with physics tick rate, at least in case of this game, since nothing is connected to _physics_process() (all “follow mouse” functions are triggered by _input() ).
Let me know, if you’ll get more data on that, will check it on my side :D