function onClicked() game.StarterGui.Tutorial.Tutorial1.Visible = false end script.Parent.MouseButton1Click:connect(onClicked)
I know it's a basic script, but the output won't give me any errors, and the Gui and it's children won't go invisible?
Is that the whole script? If it is then I would recommend putting local variables for the Tutorial numbers. One thing to do instead of visible is out each tutorial with BackgroundTransparency to 1 and the text. I know it's a lot of work but it will get the job done. Also instead of MouseButton1Click use MouseButton1Down. Hope it solves the problem!