Controller input doesn’t work? What gamepad are you using (xbox, playstation, custom, etc?) Did you click on the game before using the controller? And lastly what browser are you using?
It’s not a bad idea, in truth I had originally considered making it so that any collision would break invisibility (even picking up a coin) but I judged it too weak. Also, even if I wanted to, I can’t add new features since the jam is closed, the most I can do is fix bugs.
EDIT: Are you using the joystick to try to move the character?
The gamepad controls only use the d-pad and the south button