Hi there,
I am pretty sure you have to define all your pages that you want to load in the Sub Application Start section, and then you just show the page when the button is pressed - so take all this code..
Page2.Initialize("Page2")
Page2.Title = "XD"
Page2.RootPanel.LoadLayout("Start")
Page2.RootPanel.Color = Colors.White
Page2.RootPanel.LoadLayout("Game")
and put it in to the Sub Application Start section and just call
NavControl.ShowPage(Page2)
in your Sub Start_Click routine