Godot default UI theme my beloved <3
Maybe scrollwheel to help with panning?
Loved this. Really like incremental games, I'm sure this could be iterated on and get to a decent point. Art is nice. The circles around clickable stuff is a nice a touch. Really love that you straight up just slap them. Like this is completely polish-polish levels of polish, for when you slap: tween the progressbar number to visually bounce/shake. Maybe use Tween.Elastic for that. I know it's already communicated with the wheel going faster, but I think it could be a nice touch.