Like so, when you enter the game you just click the screen with the start button to begin with a picture on the screen?
You can use the PlayerAdded event in Players to tell when a player was added and then make a gui visible for that player. For example:
game.Players.PlayerAdded:connect(function(np) np.PlayerGui.ScreenGui.Gui.Visible=true end)
Add a GUI into the StarterGui so when a player enters, the GUI appears on their screen. Put this script inside the enter/begin/etc button to remove the GUI:
script.Parent.MouseButton1Click:connect(function(mouse) if mouse then script.Parent.Parent.Visible = false end end)
The hierarchies should look like this:
ScreenGui -Frame -TextButton -Script
Hope this helps.