It used to just be a button titled “Button” and nothing happened when you click it
EDIT: it said wynd and I clicked it and it changed to TheAwesome98.
for non beta:
the [+] and [-] have a click animation then grow and shrink the button, it also said jeffalo the first time i saw it, so it might say the last user who pressed it, or jeffalo is the default and it needs a second to update.