What could possibly cause this whilst it's working on anywhere else.

Question

It's a Button node.

Skolnik

Answer 1

_on_button_down() is a function call, not a signal. You can call connect() only on signals or objects. Try self.button_down.connect(...)

Westberg

Answer 2

oh I see sorry for the inconvenience I was a bit sleepdrunk figuring out why not add a main menu stuff with my other project.

Skolnik