I was going to show my game to someone, I runned it and the play button stopped working, I tried disconnecting the "pressed()" function and reconnecting it, deleting the button and making a new one, and nothing worked, Now when I connect a function to the script, " -> void" is added, something that didn't happened to me before, I checked the other scenes and all the buttons in my project stopped working

    oreo11 did you by chance put a colorrect or another control node over your buttons? These have a mouse filter by default that can block signals. Try switching the mouse mode to pass.

    I changed this discussion to the help tag 👍

    You say that the play button doesn't start your game anymore. Did you check that there is no error in your script?